don't pass argc in getopt32, it's superfluous

(add/remove: 0/0 grow/shrink: 12/131 up/down: 91/-727) Total: -636 bytes
   text    data     bss     dec     hex filename
 773469    1058   11092  785619   bfcd3 busybox_old
 772644    1058   11092  784794   bf99a busybox_unstripped

coreutils/rmdir.c

@@ -24,7 +24,7 @@ int rmdir_main(int argc, char **argv)
 	int do_dot;
 	char *path;
 
-	flags = getopt32(argc, argv, "p");
+	flags = getopt32(argv, "p");
 	argv += optind;
 
 	if (!*argv) {