stress-opcode: fix CLOBBERED for ops_ptr for older gcc flavours

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>

Author: ColinIanKing

stress-opcode.c

@@ -525,7 +525,7 @@ static int stress_opcode(stress_args_t *args)
 			const size_t ops_size = page_size * PAGES;
 			void *ops_begin = (void *)((uint8_t *)opcodes + page_size);
 			void *ops_end = (void *)((uint8_t *)ops_begin + ops_size);
-			CLOBBERED void *ops_ptr;
+			void * CLOBBERED ops_ptr;
 
 			stress_proc_state_set(args->name, STRESS_STATE_RUN);
 			stress_make_it_fail_set();