getopt_ulflags -> getopt32.

It is impossible to formulate sane ABI based on
size of ulong because it can be 32-bit or 64-bit.
Basically it means that you cannot portably use
more that 32 option chars in one call anyway...
Make it explicit.

coreutils/rmdir.c

@@ -22,7 +22,7 @@ int rmdir_main(int argc, char **argv)
 	int do_dot;
 	char *path;
 
-	flags = bb_getopt_ulflags(argc, argv, "p");
+	flags = getopt32(argc, argv, "p");
 
 	argv += optind;