Summary: Code is already in compiler-rt

Reviewers: kcc

Subscribers: krytarowski, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D38912

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315937 91177308-0d34-0410-b5e6-96231b3b80d8