crtools --help: add --ms option to check syntax

Alternatively, we could add [<options>] but since this is the only
option let's just add this one.
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

crtools.c

@@ -348,7 +348,7 @@ usage:
 	pr_msg("  %s dump -t PID [<options>]\n", argv[0]);
 	pr_msg("  %s restore -t PID [<options>]\n", argv[0]);
 	pr_msg("  %s show (-D DIR)|(-f FILE) [<options>]\n", argv[0]);
-	pr_msg("  %s check\n", argv[0]);
+	pr_msg("  %s check [--ms]\n", argv[0]);
 	pr_msg("  %s exec -p PID <syscall-string>\n", argv[0]);
 
 	pr_msg("\nCommands:\n");