Implement the MS extension __identifier properly: take a token and strip it of
its keywordliness.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@203987 91177308-0d34-0410-b5e6-96231b3b80d8
ASTTests//EvaluateAsRValueTest.cpp: Appease *-win32 target to add -fno-delayed-template-parsing.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@203991 91177308-0d34-0410-b5e6-96231b3b80d8