Revert "Remove @actorIndependent attribute."

[lorentey]

Temporarily revert #37462, to allow existing code that uses @actorIndependent to continue to work with toolchains built from the main branch. (Until that code gets updated.)

[lorentey]

@swift-ci test

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 7c0b50e

[lorentey]

15:33:32 Test Case 'TestOperationQueue.test_CustomOperationReady' started at 2021-05-24 22:33:32.923
15:33:32 
/home/buildnode/jenkins/workspace/swift-PR-Linux/branch-main/swift-corelibs-foundation/Tests/Foundation/Tests/TestOperationQueue.swift:623: error: TestOperationQueue.test_CustomOperationReady : XCTAssertEqual failed: ("2") is not equal to ("1") - 
15:33:32 Test Case 'TestOperationQueue.test_CustomOperationReady' failed (0.027 seconds)
15:33:32 Test Suite 'TestOperationQueue' failed at 2021-05-24 22:33:32.951

😑

[lorentey]

@swift-ci test linux platform

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 7c0b50e

[lorentey]

20:29:55 FAILED: bin/YamsTestRunner Tests/CMakeFiles/YamsTestRunner.dir/LinuxMain.swift.o swift/YamsTestRunner.swiftmodule 
20:29:55 : && /home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/swift-nightly-install/usr/bin/swiftc -output-file-map Tests/CMakeFiles/YamsTestRunner.dir/Release/output-file-map.json -incremental -j 32 -emit-executable -o bin/YamsTestRunner -emit-dependencies  -module-cache-path "/home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/swiftdriver-linux-x86_64/module-cache" -target x86_64-unknown-linux-gnu -O -enable-testing -Xcc -F/home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/foundation-linux-x86_64 -Xcc -I/home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/yams/Sources/CYaml/include -module-cache-path "/home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/swiftdriver-linux-x86_64/module-cache" -target x86_64-unknown-linux-gnu -O -I swift -I /home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/foundation-linux-x86_64/swift /home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/yams/Tests/LinuxMain.swift  -L /home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/swiftdriver-linux-x86_64/x86_64-unknown-linux-gnu/release/dependencies/yams/lib  -L /home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/swiftdriver-linux-x86_64/x86_64-unknown-linux-gnu/release/dependencies/yams/lib  -L /home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/foundation-linux-x86_64/lib  -L /home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/swiftdriver-linux-x86_64/x86_64-unknown-linux-gnu/release/dependencies/yams/lib   -L /usr/lib/gcc/x86_64-linux-gnu/5.4.0   -L /usr/lib/llvm-4.0/lib -Xlinker -rpath -Xlinker /home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/foundation-linux-x86_64/lib  lib/libYamsTests.a  -lXCTest  lib/libYams.a  /home/buildnode/jenkins/workspace/swift-PR-Linux@2/branch-main/buildbot_linux/foundation-linux-x86_64/lib/libFoundation.so  -lswiftDispatch  lib/libCYaml.a  -ldispatch  -lgcc  -lgcc_s  -lc  -lgcc  -lgcc_s && :
20:29:55 remark: Incremental compilation has been disabled: libYamsTests.a has no swiftDeps file
20:29:55 remark: Incremental compilation has been disabled: libYams.a has no swiftDeps file
20:29:55 remark: Incremental compilation has been disabled: libFoundation.so has no swiftDeps file
20:29:55 remark: Incremental compilation has been disabled: libCYaml.a has no swiftDeps file
20:29:55 error: autolink-extract command failed with exit code 1 (use -v to see invocation)
20:29:55 
<unknown>:0: error: error opening input file 'lib/libYamsTests.a' (The file was not recognized as a valid object file)

🙄

[lorentey]

@swift-ci smoke test linux platform

[DougGregor]

Gaaa! There's a better way to do this :(

[DougGregor]

Here's how I'm addressing this: #37773