Mark the parenthesized array member initialization diagnostic as DefaultError,
and move it out of -Wgnu so that -Wno-gnu leaves it enabled. As requested by
Eli.

llvm-svn: 150643
diff --git a/clang/test/SemaCXX/cxx0x-initializer-aggregates.cpp b/clang/test/SemaCXX/cxx0x-initializer-aggregates.cpp
index b5fa5fe..48888d0 100644
--- a/clang/test/SemaCXX/cxx0x-initializer-aggregates.cpp
+++ b/clang/test/SemaCXX/cxx0x-initializer-aggregates.cpp
@@ -71,5 +71,5 @@
     static_assert(sizeof(overloaded({1})) == sizeof(one), "bad overload");
   }
 
-  struct C { int a[2]; C():a({1, 2}) { } }; // expected-warning {{parenthesized initialization of a member array is a GNU extension}}
+  struct C { int a[2]; C():a({1, 2}) { } }; // expected-error {{parenthesized initialization of a member array is a GNU extension}}
 }