Fix argument parsing in test(1) and chmod(1)

We just take the raw argument list as is. Using arg.h, arguments
beginning with - would have been "eaten up".
Writing a special "bailout" for arg.h was not a good option,
not because it's not impossible (done in 6 LOC), but because it
is a shoehorning around a corner case present for a few programs
which are broken by design by POSIX.

chown.c

@@ -52,7 +52,6 @@ main(int argc, char *argv[])
 	struct recursor r = { .fn = chownpwgr, .hist = NULL, .depth = 0, .follow = 'P', .flags = 0};
 	char *owner, *group;
 
-
 	ARGBEGIN {
 	case 'h':
 		hflag = 1;