Add Turkish, Filipino and Indonesian

changelogs/unreleased/bvl-port-of-ee-translations.yml

+---
+title: Started translation into Turkish, Indonesian and Filipino
+merge_request: 17526
+author:
+type: other

lib/gitlab/i18n.rb

@@ -18,7 +18,10 @@ module Gitlab
       'uk' => 'Українська',
       'ja' => '日本語',
       'ko' => '한국어',
-      'nl_NL' => 'Nederlands'
+      'nl_NL' => 'Nederlands',
+      'tr_TR' => 'Türkçe',
+      'id_ID' => 'Bahasa Indonesia',
+      'fil_PH' => 'Filipino'
     }.freeze
 
     def available_locales