DiagnosticsEngine: update severity setters to new terminology

llvm-svn: 210764
diff --git a/clang/lib/Basic/Warnings.cpp b/clang/lib/Basic/Warnings.cpp
index a0a2164..98f85a0 100644
--- a/clang/lib/Basic/Warnings.cpp
+++ b/clang/lib/Basic/Warnings.cpp
@@ -125,7 +125,7 @@
             Diags.setEnableAllWarnings(true);
           } else {
             Diags.setEnableAllWarnings(false);
-            Diags.setMappingForAllDiagnostics(diag::Severity::Ignored);
+            Diags.setSeverityForAll(diag::Severity::Ignored);
           }
         }
         continue;
@@ -194,7 +194,7 @@
           EmitUnknownDiagWarning(Diags, isPositive ? "-W" : "-Wno-", Opt,
                                  isPositive);
       } else {
-        Diags.setDiagnosticGroupMapping(Opt, Mapping);
+        Diags.setSeverityForGroup(Opt, Mapping);
       }
     }
   }