mkdir: Fail on EEXIST with no -p flag

mkdir without the -p flag should only exit success if it actually made
the directory.

mkdir.c

@@ -38,8 +38,7 @@ main(int argc, char *argv[])
 		if (pflag) {
 			if (mkdirp(*argv) < 0)
 				ret = 1;
-		} else if (mkdir(*argv, S_IRWXU | S_IRWXG | S_IRWXO) < 0 &&
-		           errno != EEXIST) {
+		} else if (mkdir(*argv, S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
 			weprintf("mkdir %s:", *argv);
 			ret = 1;
 		}