Updated mediawiki/extensions
Project: mediawiki/extensions/CustomUserSignup  ad0a72b1a8952fae70e48045e500941abb4ea08d

Migrate to JSON i18n

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

Change-Id: I88036e5a47e1ff79cdaccdc3c660ad6659fdf062