Don't diagnose errors when a file matches an include component

This regressed in r368322, and was reported as PR42948 and on the
mailing list. The fix is to ignore the specific error code for this
c

Don't diagnose errors when a file matches an include component

This regressed in r368322, and was reported as PR42948 and on the
mailing list. The fix is to ignore the specific error code for this
case. The problem doesn't seem to reproduce on Windows, where a
different error code is used instead.

llvm-svn: 368475

show more ...