skip test for non bundled lib

Author: devnexen

ext/gd/tests/gh17772.phpt

@@ -6,6 +6,10 @@ gd
 memory_limit=2M
 --CREDITS--
 YuanchengJiang
+--SKIPIF--
+<?php
+if (!GD_BUNDLED) die("skip requires bundled GD library\n");
+?>
 --FILE--
 <?php
 function setStyleAndThickness($im, $color, $thickness)