[lit, python] Always add quotes around the python path in lit

Summary:
The issue with the python path is that the path to python on Windows can contain spaces. To make the tests always work, the path to python needs to be surrounded by quotes.

This is a companion change to: https://reviews.llvm.org/D50206

Reviewers: asmith, zturner, espindola

Subscribers: emaste, sbc100, arichardson, aheejin, steven_wu, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D50282

llvm-svn: 339075

lld/test/ELF/lto/cache.ll

@@ -13,7 +13,7 @@
 ; RUN: ls %t.cache | count 4
 
 ; Create a file of size 64KB.
-; RUN: "%python" -c "print(' ' * 65536)" > %t.cache/llvmcache-foo
+; RUN: %python -c "print(' ' * 65536)" > %t.cache/llvmcache-foo
 
 ; This should leave the file in place.
 ; RUN: ld.lld --thinlto-cache-dir=%t.cache --thinlto-cache-policy cache_size_bytes=128k:prune_interval=0s -o %t3 %t2.o %t.o

lld/test/mach-o/dependency_info.yaml

@@ -9,7 +9,7 @@
 # RUN:        -F/Custom/Frameworks \
 # RUN:        -framework Bar \
 # RUN:        -framework Foo
-# RUN: '%python' %p/Inputs/DependencyDump.py %t.info | FileCheck %s
+# RUN: %python %p/Inputs/DependencyDump.py %t.info | FileCheck %s
 
 
 # CHECK: linker-vers: lld

lld/test/wasm/lto/cache.ll

@@ -11,7 +11,7 @@
 ; RUN: ls %t.cache | count 4
 
 ; Create a file of size 64KB.
-; RUN: "%python" -c "print(' ' * 65536)" > %t.cache/llvmcache-foo
+; RUN: %python -c "print(' ' * 65536)" > %t.cache/llvmcache-foo
 
 ; This should leave the file in place.
 ; RUN: wasm-ld --thinlto-cache-dir=%t.cache --thinlto-cache-policy cache_size_bytes=128k:prune_interval=0s -o %t.wasm %t2.o %t.o