Fixed test for ZTS builds

ext/pdo_pgsql/tests/bug_33876.phpt

@@ -3,13 +3,13 @@ PDO PgSQL Bug #33876
 --SKIPIF--
 <?php
 if (!extension_loaded('pdo') || !extension_loaded('pdo_pgsql')) die('skip not loaded');
-require 'ext/pdo/tests/pdo_test.inc';
+require dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc';
 PDOTest::skip();
 ?>
 --FILE--
 <?php
-require 'ext/pdo/tests/pdo_test.inc';
-$db = PDOTest::test_factory('ext/pdo_pgsql/tests/common.phpt');
+require dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc';
+$db = PDOTest::test_factory(dirname(__FILE__) . '/common.phpt');
 $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT);
 
 $db->exec('CREATE TABLE test (foo varchar(5) NOT NULL, bar bool NOT NULL)');