Make it possible for using decls to point to operators. Fixes PR4441.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74362 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index cbe0ad7..2d27ccc 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -1574,6 +1574,7 @@
                                         const CXXScopeSpec &SS,
                                         SourceLocation IdentLoc,
                                         IdentifierInfo *TargetName,
+                                        OverloadedOperatorKind Op,
                                         AttributeList *AttrList,
                                         bool IsTypeName);