Updated mediawiki/extensions
Project: mediawiki/extensions/SemanticSignup  d07b5411b2db60714dc8ba675fb11e3acb5b924b

Migrate to JSON i18n

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

Change-Id: I5a7bd120147b618a7702b63a830bf1dce160f6d4