Include "tconfig.h" before "runtime.h".

From-SVN: r6112

gcc/objc/objects.c

@@ -24,8 +24,8 @@ You should have received a copy of the GNU General Public License along with
    however invalidate any other reasons why the executable file might be
    covered by the GNU General Public License.  */
 
-#include "runtime.h"		/* the kitchen sink */
 #include "../tconfig.h"         /* include defs of bzero for target */
+#include "runtime.h"		/* the kitchen sink */
 
 id __objc_object_alloc(Class*);
 id __objc_object_dispose(id);