[build-script] Add swift-disable-dead-stripping option for disabling dead stripping

[mininny]

With the new build script flag --swift-disable-dead-stripping, swift frontend will be built without dead stripping which can improve debugging.

Resolves SR-13631.

[varungandhi-apple]

@swift-ci smoke test and merge

[varungandhi-apple]

Couple of Python test failures:

******************** TEST 'Swift(macosx-x86_64) :: Python/build_swift.swift' FAILED ********************
Script:
--
: 'RUN: at line 10';   /Applications/Xcode.app/Contents/Developer/usr/bin/python3 /Users/buildnode/jenkins/workspace/swift-PR-macos-smoke-test/branch-main/swift/utils/build_swift/run_tests.py
--
Exit Code: 1

Command Output (stderr):
--
.....................................................................................................................................................................................................................................................................................................................F.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
======================================================================
FAIL: test_expected_options_exhaustive (tests.build_swift.test_driver_arguments.TestDriverArgumentParser)
Test that we are exhaustively testing all options accepted by the
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/buildnode/jenkins/workspace/swift-PR-macos-smoke-test/branch-main/swift/utils/build_swift/tests/build_swift/test_driver_arguments.py", line 418, in test_expected_options_exhaustive
    self.fail('non-exhaustive expected options, missing: {}'
AssertionError: non-exhaustive expected options, missing: {'--swift-disable-dead-stripping'}

----------------------------------------------------------------------
Ran 1039 tests in 33.278s

FAILED (failures=1)

--

********************
PASS: Swift(macosx-x86_64) :: Evolution/test_enum_add_cases_trap.swift (7486 of 14077)
PASS: Swift(macosx-x86_64) :: Evolution/test_conformance_reference.swift (7487 of 14077)
PASS: Swift(macosx-x86_64) :: Evolution/test_enum_add_cases.swift (7488 of 14077)
FAIL: Swift(macosx-x86_64) :: Python/python_lint.swift (7489 of 14077)
******************** TEST 'Swift(macosx-x86_64) :: Python/python_lint.swift' FAILED ********************
Script:
--
: 'RUN: at line 8';   /Applications/Xcode.app/Contents/Developer/usr/bin/python3 /Users/buildnode/jenkins/workspace/swift-PR-macos-smoke-test/branch-main/swift/utils/python_lint.py
--
Exit Code: 1

Command Output (stdout):
--
./utils/build-script:603:1: W293 blank line contains whitespace
./utils/build_swift/build_swift/driver_arguments.py:337:1: W293 blank line contains whitespace

--

********************

[mininny]

Couple of Python test failures:

******************** TEST 'Swift(macosx-x86_64) :: Python/build_swift.swift' FAILED ********************
Script:
--
: 'RUN: at line 10';   /Applications/Xcode.app/Contents/Developer/usr/bin/python3 /Users/buildnode/jenkins/workspace/swift-PR-macos-smoke-test/branch-main/swift/utils/build_swift/run_tests.py
--
Exit Code: 1

Command Output (stderr):
--
.....................................................................................................................................................................................................................................................................................................................F.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
======================================================================
FAIL: test_expected_options_exhaustive (tests.build_swift.test_driver_arguments.TestDriverArgumentParser)
Test that we are exhaustively testing all options accepted by the
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/buildnode/jenkins/workspace/swift-PR-macos-smoke-test/branch-main/swift/utils/build_swift/tests/build_swift/test_driver_arguments.py", line 418, in test_expected_options_exhaustive
    self.fail('non-exhaustive expected options, missing: {}'
AssertionError: non-exhaustive expected options, missing: {'--swift-disable-dead-stripping'}

----------------------------------------------------------------------
Ran 1039 tests in 33.278s

FAILED (failures=1)

--

********************
PASS: Swift(macosx-x86_64) :: Evolution/test_enum_add_cases_trap.swift (7486 of 14077)
PASS: Swift(macosx-x86_64) :: Evolution/test_conformance_reference.swift (7487 of 14077)
PASS: Swift(macosx-x86_64) :: Evolution/test_enum_add_cases.swift (7488 of 14077)
FAIL: Swift(macosx-x86_64) :: Python/python_lint.swift (7489 of 14077)
******************** TEST 'Swift(macosx-x86_64) :: Python/python_lint.swift' FAILED ********************
Script:
--
: 'RUN: at line 8';   /Applications/Xcode.app/Contents/Developer/usr/bin/python3 /Users/buildnode/jenkins/workspace/swift-PR-macos-smoke-test/branch-main/swift/utils/python_lint.py
--
Exit Code: 1

Command Output (stdout):
--
./utils/build-script:603:1: W293 blank line contains whitespace
./utils/build_swift/build_swift/driver_arguments.py:337:1: W293 blank line contains whitespace

--

********************

Thanks for letting me know! I tried to fix it by looking around the code, but I couldn't test it with validation test on my MacBook(it keeps getting stuck). Can you please try run the test again? :)

[varungandhi-apple]

Sure. Btw, one way your should be able to run them is by something like:

$ utils/build-script [... other flags ...] --validation-test
# Hit Ctrl-C once it starts executing the validation tests
# This should create a validation-test-macosx-x86_64 directory
/path/to/lit.py -s -vv /path/to/swift-macosx-x86_64/validation-test-macosx-x86_64 --filter "Python"

@swift-ci smoke test

[mininny]

Sure. Btw, one way your should be able to run them is by something like:

$ utils/build-script [... other flags ...] --validation-test
# Hit Ctrl-C once it starts executing the validation tests
# This should create a validation-test-macosx-x86_64 directory
/path/to/lit.py -s -vv /path/to/swift-macosx-x86_64/validation-test-macosx-x86_64 --filter "Python"

@swift-ci smoke test

Thanks! :) Can you please trigger the test again?

[varungandhi-apple]

@swift-ci smoke test