Add missing equals.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145290 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/Warnings.cpp b/lib/Frontend/Warnings.cpp
index cc7c48c..e63bc21 100644
--- a/lib/Frontend/Warnings.cpp
+++ b/lib/Frontend/Warnings.cpp
@@ -133,7 +133,7 @@
           // Set the warning as error flag for this specifier.
           Diags.setDiagnosticGroupWarningAsError(Specifier, isPositive);
         } else if (DiagIDs->getDiagnosticsInGroup(Specifier, _Diags)) {
-          EmitUnknownDiagWarning(Diags, "-Werror", Specifier, isPositive);
+          EmitUnknownDiagWarning(Diags, "-Werror=", Specifier, isPositive);
         }
         continue;
       }
@@ -161,7 +161,8 @@
           // Set the error as fatal flag for this specifier.
           Diags.setDiagnosticGroupErrorAsFatal(Specifier, isPositive);
         } else if (DiagIDs->getDiagnosticsInGroup(Specifier, _Diags)) {
-          EmitUnknownDiagWarning(Diags, "-Wfatal-errors", Specifier, isPositive);
+          EmitUnknownDiagWarning(Diags, "-Wfatal-errors=", Specifier,
+                                 isPositive);
         }
         continue;
       }