Add missing MD canonicalization to MS vtable builder

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@230445 91177308-0d34-0410-b5e6-96231b3b80d8

lib/AST/VTableBuilder.cpp

@@ -2930,6 +2930,7 @@ static void GroupNewVirtualOverloads(
   typedef llvm::DenseMap<DeclarationName, unsigned> VisitedGroupIndicesTy;
   VisitedGroupIndicesTy VisitedGroupIndices;
   for (const auto *MD : RD->methods()) {
+    MD = MD->getCanonicalDecl();
     VisitedGroupIndicesTy::iterator J;
     bool Inserted;
     std::tie(J, Inserted) = VisitedGroupIndices.insert(