Updated mediawiki/extensions
Project: mediawiki/extensions/Translate  ad2642f268740b41f3e1fd636d13e712a89f3018

JsonFFS: indent with tabs

Just hardcoding this for now. Will make it configurable in case it
is needed for a different project.

Change-Id: I5a6eb78996171b156f87e8be995294ffb3e20749