Fix handling of -Wno-pedantic

llvm-svn: 250452
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: f2be7c28fc0e3b439ed36a7b8f34d05c8f16fd25
1 file changed