MS ABI: Fix a couple of -Winconsistent-missing-override warnings

llvm-svn: 232559
diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index c402f4a..b8dd72f 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -123,7 +123,7 @@
                               int32_t VBPtrOffset, uint32_t VBIndex,
                               raw_ostream &Out) override;
   void mangleCXXHandlerMapEntry(QualType T, bool IsConst, bool IsVolatile,
-                                bool IsReference, raw_ostream &Out);
+                                bool IsReference, raw_ostream &Out) override;
   void mangleCXXRTTI(QualType T, raw_ostream &Out) override;
   void mangleCXXRTTIName(QualType T, raw_ostream &Out) override;
   void mangleCXXRTTIBaseClassDescriptor(const CXXRecordDecl *Derived,