Updated mediawiki/extensions
Project: mediawiki/extensions/SoundManager2Button  2909e78e90d300e1478a3070fc9b94734d127c12

Migrate to JSON i18n

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

Change-Id: I6b7fb5ddf1bcbaf17e6637dc55c023f15345bb88