[PhpUnitBridge] more fixes for PHP 5.5

Author: nicolas-grekas

DeprecationErrorHandler/Deprecation.php

@@ -249,7 +249,7 @@ private static function getVendors()
             foreach (get_declared_classes() as $class) {
                 if ('C' === $class[0] && 0 === strpos($class, 'ComposerAutoloaderInit')) {
                     $r = new \ReflectionClass($class);
-                    $v = \dirname($r->getFileName(), 2);
+                    $v = \dirname(\dirname($r->getFileName()));
                     if (file_exists($v.'/composer/installed.json')) {
                         self::$vendors[] = $v;
                         $loader = require $v.'/autoload.php';

Tests/DeprecationErrorHandler/DeprecationTest.php

@@ -29,7 +29,7 @@ public function testItCanTellWhetherItIsInternal()
     {
         $r = new \ReflectionClass(Deprecation::class);
 
-        if (dirname($r->getFileName(), 2) !== dirname(__DIR__, 2)) {
+        if (\dirname(\dirname($r->getFileName())) !== \dirname(\dirname(__DIR__))) {
             $this->markTestSkipped('Test case is not compatible with having the bridge in vendor/');
         }