Updated mediawiki/extensions
Project: mediawiki/extensions/Lockdown  d550dab80fef140943b445f3e4acb1f14a5bde7d

Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: If67df9fe5a6ca043cb405a783d4a414a02ce4772