Skip new preload test on Windows

Author: cmb69

ext/opcache/tests/jit/bug81256.phpt

@@ -2,6 +2,10 @@
 Bug #81256: Assertion `zv != ((void *)0)' failed for "preload" with JIT
 --EXTENSIONS--
 opcache
+--SKIPIF--
+<?php
+if (PHP_OS_FAMILY === "Windows") die("skip Windows does not support preloading");
+?>
 --INI--
 opcache.enable=1
 opcache.enable_cli=1