Suppress -Wswitch to unbreak the build.

This may need to be fixed more intelligently - I don't have enough context to
be sure what the appropriate fix is right now.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175902 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed