Add clang-cc support for -disable-llvm-optzns.
 - Avoids running any LLVM optimizations, even at -O2, etc., while still keeping
   any language changes these optimizations imply.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72742 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed