invalid directives can occur in #if 0 code, just pass them
through like other directives PTH doesn't care about.  This
should fix rdar://6804029


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69524 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed