Merging r278949: (excluding the clang-include-fixer.el part)

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r278949 | eugenezelenko | 2016-08-17 10:27:56 -0700 (Wed, 17 Aug 2016) | 4 lines

[Include-fixer] Install executables and support scripts

Differential revision: https://reviews.llvm.org/D23045

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llvm-svn: 278997