[clang-tidy] Update run-clang-tidy.py with config arg
[clang-tidy] Update run-clang-tidy.py with config arg

Updating the run-clang-tidy.py script to allow specification of the
config argument to the clang-tidy invocation.

Differential Revision: https://reviews.llvm.org/D43538

git-svn-id: a34e9779ed74578ad5922b3306b3d80a0c825546@327186 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra