Convert tests I recently add to use -verify instead of FileCheck.

This uncovered something strange. Diagnostics for InlineAsm have source locations
that don't really map to where they are within the .c source file.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@210440 91177308-0d34-0410-b5e6-96231b3b80d8