[Diffusion] rL247890: [clang-tidy] install helper scripts

[Tom Stellard via llvm-commits]

tstellarAMD accepted this commit.
tstellarAMD added a comment.

r253118


Users:
  alexfh (Author, Auditor)
  3.7-release (Auditor)
  llvm-commits (Auditor)
  tstellarAMD (Auditor)

http://reviews.llvm.org/rL247890