Due to a bug, -Wno-everything works like -Weverything. Fix the bug by having
-Wno-everything remap all warnings to ignored.

We can now use "-Wno-everything -W<warning>" to ignore all warnings except
specific ones.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149121 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed