Tim Northover f3dc32864a CMake: Silence more stderr when running git.
It can confuse bots collecting errors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301934 91177308-0d34-0410-b5e6-96231b3b80d8
2017-05-02 16:37:37 +00:00
..

See docs/CMake.html for instructions on how to build LLVM with CMake.