Merging r341244:
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r341244 | tstellar | 2018-08-31 22:15:31 +0200 (Fri, 31 Aug 2018) | 11 lines
lit: Use sys.executable for executing builtin commands
Summary:
The python executable may not exist on all systems so use sys.executable
instead.
Reviewers: ddunbar, stella.stamenova
Subscribers: delcypher, llvm-commits
Differential Revision: https://reviews.llvm.org/D51511
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_70@341349
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