ext/random: mark rand() as an alias of mt_rand()

Author: Girgias

ext/random/random.stub.php

@@ -23,10 +23,11 @@ function mt_srand(?int $seed = null, int $mode = MT_RAND_MT19937): void {}
     /** @alias mt_srand */
     function srand(?int $seed = null, int $mode = MT_RAND_MT19937): void {}
 
-    function rand(int $min = UNKNOWN, int $max = UNKNOWN): int {}
-
     function mt_rand(int $min = UNKNOWN, int $max = UNKNOWN): int {}
 
+    /* @alias mt_rand */
+    function rand(int $min = UNKNOWN, int $max = UNKNOWN): int {}
+
     /** @compile-time-eval */
     function mt_getrandmax(): int {}