Issue #2053519 by alexpott: Broken PHPUnit test with E_STRICT enabled for...

Issue #2053519 by alexpott:  Broken PHPUnit test with E_STRICT enabled for AJAX fails on View with 'AJAX: Yes'.

core/modules/views/tests/Drupal/views/Tests/Controller/ViewAjaxControllerTest.php

@@ -177,7 +177,7 @@ protected function setupValidMocks() {
 namespace {
   // @todo Remove once drupal_get_destination is converted to autoloadable code.
   if (!function_exists('drupal_static')) {
-    function drupal_static($key) {
+    function &drupal_static($key) {
       return $key;
     }
   }