Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/translation/Tests/Loader/LocalizedTestCase.php

@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Translation\Tests\Loader;
+
+abstract class LocalizedTestCase extends \PHPUnit_Framework_TestCase
+{
+    protected function setUp()
+    {
+        if (!extension_loaded('intl')) {
+            $this->markTestSkipped('The "intl" extension is not available');
+        }
+    }
+}