When disambiguating an expression-statement from a declaraton-statement, if the

statement starts with an identifier for which name lookup will fail either way,
look at later tokens to disambiguate in order to improve error recovery.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162464 91177308-0d34-0410-b5e6-96231b3b80d8