run test

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@111946 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/testsuite/g++.dg/ext/alignof2.C

@@ -2,6 +2,8 @@
 // We were treating alignof (sa.a) as alignof (typeof (sa.a)), which is
 // wrong for some fields.
 
+// { dg-do run }
+
 extern "C" void abort();
 
 struct A