This is still used by some users of Fuchsia toolchain. Also include
llc and opt which is useful for development and testing.

Differential Revision: https://reviews.llvm.org/D32231

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@300917 91177308-0d34-0410-b5e6-96231b3b80d8