Updated mediawiki/extensions
Project: mediawiki/extensions/Hovergallery  29b9ddbfd4cc74116f65ec09dba9bb33298a87bc

Migrate to JSON i18n

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

Change-Id: Idd7f19b5ae3542a607996de70a83b720c3649560