Fixed test for ZTS builds

ext/pdo_mysql/tests/bug_33689.phpt

@@ -3,14 +3,14 @@ PDO MySQL Bug #33689
 --SKIPIF--
 <?php
 if (!extension_loaded('pdo') || !extension_loaded('pdo_mysql')) die('skip not loaded');
-require 'ext/pdo_mysql/tests/config.inc';
-require 'ext/pdo/tests/pdo_test.inc';
+require dirname(__FILE__) . '/config.inc';
+require dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc';
 PDOTest::skip();
 ?>
 --FILE--
 <?php
-require 'ext/pdo/tests/pdo_test.inc';
-$db = PDOTest::test_factory('ext/pdo_mysql/tests/common.phpt');
+require dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc';
+$db = PDOTest::test_factory(dirname(__FILE__) . '/common.phpt');
 
 $db->exec('CREATE TABLE test (bar INT NOT NULL)');
 $db->exec('INSERT INTO test VALUES(1)');