Tweak test, skip instead of FAIL.

Author: tricky

tests/experimental/serializer/serializer_php_bad_serialize.phpt

@@ -1,8 +1,15 @@
 --TEST--
 Serializer: exception while serializing
---XFAIL--
 --SKIPIF--
-<?php if (!extension_loaded("memcached")) print "skip"; ?>
+<?php
+	if (!extension_loaded("memcached")) print "skip";
+	if ($_ENV['TEST_MEMC_SERIALIZER'] == 'Memcached::SERIALIZER_JSON') {
+		echo "skip skip when using JSON";
+	}
+	if ($_ENV['TEST_MEMC_SERIALIZER'] == 'Memcached::SERIALIZER_PHP' ||
+		!isset($_ENV['TEST_MEMC_SERIALIZER'])) {
+		echo "skip skip when using PHP internal";
+	}
 --FILE--
 <?php
 class Foo {

tests/experimental/serializer/serializer_php_bad_unserialize.phpt

@@ -1,7 +1,11 @@
 --TEST--
 Serializer: exception while unserializing
 --SKIPIF--
-<?php if (!extension_loaded("memcached")) print "skip"; ?>
+<?php
+	if (!extension_loaded("memcached")) print "skip";
+	if ($_ENV['TEST_MEMC_SERIALIZER'] == 'Memcached::SERIALIZER_JSON') {
+		echo "skip skip when using JSON";
+	}
 --FILE--
 <?php
 class Foo implements Serializable {

tests/experimental/set_badserialize.phpt

@@ -1,7 +1,6 @@
 --TEST--
 Memcached::set() with bad serialize
 --SKIPIF--
---XFAIL--
 <?php if (!extension_loaded("memcached")) print "skip"; ?>
 --FILE--
 <?php

tests/experimental/setmulti_badserialize.phpt

@@ -1,6 +1,5 @@
 --TEST--
 Memcached::setMultiByKey() with bad serialize
---XFAIL--
 --SKIPIF--
 <?php if (!extension_loaded("memcached")) print "skip"; ?>
 --FILE--