Skip two gettext tests under --repeat

gettext leaks global state across requests, so don't repeat these
tests. See also GH-6641.

Author: nikic

ext/gettext/tests/bug53251.phpt

@@ -3,6 +3,7 @@ Bug #53251 (bindtextdomain with null dir doesn't return old value)
 --SKIPIF--
 <?php
 if (!extension_loaded('gettext')) die('skip gettext extension not available');
+if (getenv('SKIP_REPEAT')) die('skip gettext leaks global state across requests');
 ?>
 --FILE--
 <?php

ext/gettext/tests/gettext_bindtextdomain-cwd.phpt

@@ -8,6 +8,10 @@ if (!extension_loaded("gettext")) {
 if (!setlocale(LC_ALL, 'en_US.UTF-8')) {
     die("skip en_US.UTF-8 locale not supported.");
 }
+if (getenv('SKIP_REPEAT')) {
+    die('skip gettext leaks global state across requests');
+}
+?>
 --FILE--
 <?php
 $base_dir = __DIR__;