Updated mediawiki/extensions
Project: mediawiki/extensions/Checkpoint  413914646e02c08c96bb82035ee01dbd94f8d9fa

Migrate to JSON i18n

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

Change-Id: I68bc14d3d4c253ddc37bbd820aca799a36d66567