libclang: fix a bug in processing invalid arguments, introduced in r201249

Recommit r201346, reverted in r201373.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@201578 91177308-0d34-0410-b5e6-96231b3b80d8
Add files that I forgot to svn add in 201578.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@201579 91177308-0d34-0410-b5e6-96231b3b80d8