tests/membarrier: add additional return value

linux commit 809232619f5b ("sched/membarrier: Fix membarrier-rseq fence
command missing from query bitmask") changed the returned value, so we
need to adjust the strace test as well.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>

tests/membarrier.c

@@ -72,6 +72,14 @@ main(void)
 			       "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ";
 			break;
 
+		case 2|4|8|16|128|256:
+			text = "MEMBARRIER_CMD_GLOBAL_EXPEDITED|"
+			       "MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED|"
+			       "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
+			       "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED|"
+			       "MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ|"
+			       "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ";
+			break;
 		default:
 			error_msg_and_fail("membarrier returned %#x, does"
 					   " the test have to be updated?", rc);