Change WarnUnsupported to ErrorUnsupported (in name and in practice).
 - We are beyond the point where this shows up often and when it does
   generating miscompiled files is bad.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54836 91177308-0d34-0410-b5e6-96231b3b80d8
11 files changed