Skip test without ZMM

Author: nikic

Zend/tests/bug81070.phpt

@@ -1,5 +1,9 @@
 --TEST--
 Bug #81070	Setting memory limit to below current usage
+--SKIPIF--
+<?php
+if (getenv("USE_ZEND_ALLOC") === "0") die("skip requires zmm");
+?>
 --FILE--
 <?php
 $a = str_repeat("0", 5 * 1024 * 1024);