MFB5.3: fix SKIPIF

ext/pdo/tests/bug_43663.phpt

@@ -1,9 +1,8 @@
 --TEST--
 PDO Common: Bug #43663 (__call on classes derived from PDO)
---FILE--
 --SKIPIF--
 <?php # vim:ft=php
-if (!extension_loaded('pdo')) die('skip');
+if (!extension_loaded('pdo_sqlite')) die('skip no pdo_sqlite');
 ?>
 --FILE--
 <?php

ext/pdo/tests/bug_44159.phpt

@@ -1,5 +1,9 @@
 --TEST--
 Bug #44159 (Crash: $pdo->setAttribute(PDO::STATEMENT_ATTR_CLASS, NULL))
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo_sqlite')) die('skip no pdo_sqlite');
+?>
 --FILE--
 <?php