Extend the error recovery for a template-argument-list terminated by '>>' to

Extend the error recovery for a template-argument-list terminated by '>>' to
also deal with '>>>' (in CUDA), '>=', and '>>='. Fix the FixItHints logic to
deal with cases where the token is followed by an adjacent '=', '==', '>=',
'>>=', or '>>>' token, where a naive fix-it would result in a differing token
stream on a re-lex.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158652 91177308-0d34-0410-b5e6-96231b3b80d8