Use the -Wunknown-warning-option group for the "unknown warning group"
diagnostic in #pragma diagnostic

This matches the warning group that's specified for the unknown warning options
that are passed-in as command line arguments.

rdar://29526025


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@301647 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed