prevent default throw warning for reserved attribute names

Author: a-tarasyuk

clang/include/clang/Basic/DiagnosticLexKinds.td

@@ -408,7 +408,8 @@ def warn_pp_macro_is_reserved_id : Warning<
   "macro name is a reserved identifier">, DefaultIgnore,
   InGroup<ReservedIdAsMacro>;
 def warn_pp_macro_is_reserved_attribute_id : Warning<
-  "%0 is a reserved attribute identifier">, InGroup<ReservedAttributeIdentifier>;
+  "%0 is a reserved attribute identifier">, DefaultIgnore,
+  InGroup<ReservedAttributeIdentifier>;
 def warn_pp_objc_macro_redef_ignored : Warning<
   "ignoring redefinition of Objective-C qualifier macro">,
   InGroup<DiagGroup<"objc-macro-redefinition">>;

clang/test/Preprocessor/macro-reserved-attrs-cxx11.cpp

@@ -1,7 +1,7 @@
-// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -fsyntax-only -verify -pedantic %s -DTEST1
-// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -fsyntax-only -verify -pedantic %s -DTEST2
-// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -fsyntax-only -verify -pedantic %s -DTEST3
-// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -fsyntax-only -verify -pedantic %s -DTEST4
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -Wreserved-attribute-identifier -fsyntax-only -verify %s -DTEST1
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -Wreserved-attribute-identifier -fsyntax-only -verify %s -DTEST2
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -Wreserved-attribute-identifier -fsyntax-only -verify %s -DTEST3
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -Wreserved-attribute-identifier -fsyntax-only -verify %s -DTEST4
 
 #ifdef TEST1