Update the source so the third party code passes the File Structure Test

modules/gallery/lib/HTMLPurifier/HTMLPurifier.auto.php

@@ -0,0 +1,11 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+
+/**
+ * This is a stub include that automatically configures the include path.
+ */
+
+set_include_path(dirname(__FILE__) . PATH_SEPARATOR . get_include_path() );
+require_once 'HTMLPurifier/Bootstrap.php';
+require_once 'HTMLPurifier.autoload.php';
+
+// vim: et sw=4 sts=4