Basic/Diagnostics: Move setDiagnosticMapping() to using DiagnosticMappingInfo
and eliminate setDiagnosticMappingInternal.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140763 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed