Replace some custom C11 extension warnings with the generic warning.

llvm-svn: 370066
diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index 1375409..9b3b5c7 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -3626,7 +3626,7 @@
     }
     case tok::kw__Noreturn:
       if (!getLangOpts().C11)
-        Diag(Loc, diag::ext_c11_noreturn);
+        Diag(Tok, diag::ext_c11_feature) << Tok.getName();
       isInvalid = DS.setFunctionSpecNoreturn(Loc, PrevSpec, DiagID);
       break;