Adding intrinsics to the clang front end for the x86 TBM instruction set.

Differential Revision: http://llvm-reviews.chandlerc.com/D1751



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191681 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unused variable introduced in 191666

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191682 91177308-0d34-0410-b5e6-96231b3b80d8