merge from gcc

include/demangle.h

@@ -420,6 +420,8 @@ enum demangle_component_type
   DEMANGLE_COMPONENT_NONTRANSACTION_CLONE,
   /* A pack expansion.  */
   DEMANGLE_COMPONENT_PACK_EXPANSION,
+  /* A name with an ABI tag.  */
+  DEMANGLE_COMPONENT_TAGGED_NAME,
   /* A cloned function.  */
   DEMANGLE_COMPONENT_CLONE
 };