Disable FFI preload tests with opcache.preload_user

ext/ffi/tests/300.phpt

@@ -4,7 +4,10 @@ FFI 300: FFI preloading
 ffi
 opcache
 --SKIPIF--
-<?php if (substr(PHP_OS, 0, 3) == 'WIN') die('skip not for Windows'); ?>
+<?php
+if (substr(PHP_OS, 0, 3) == 'WIN') die('skip not for Windows');
+if (ini_get('opcache.preload_user')) die('skip FFI::load() does not support opcache.preload_user');
+?>
 --INI--
 ffi.enable=1
 opcache.enable=1

ext/ffi/tests/bug78761.phpt

@@ -5,6 +5,7 @@ ffi
 --SKIPIF--
 <?php
 if (PHP_OS_FAMILY == 'Windows') die('skip Preloading is not supported on Windows');
+if (ini_get('opcache.preload_user')) die('skip FFI::load() does not support opcache.preload_user');
 ?>
 --INI--
 opcache.enable_cli=1