Hexagon: Add and enable memops setbit, clrbit, &,|,+,- for byte, short, and word.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177747 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r177675. This is language-specific and shouldn't be in the API.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177748 91177308-0d34-0410-b5e6-96231b3b80d8
Don't use the removed API.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177749 91177308-0d34-0410-b5e6-96231b3b80d8
Reverted r176374. In some cases the lit.site.cfg file does not get generated in tools/clang/tools/extra.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177751 91177308-0d34-0410-b5e6-96231b3b80d8