Updated mediawiki/extensions
Project: mediawiki/extensions/AdManager  907c901d92f46cf21449489ca5e90c6924ff856e

Migrate to JSON i18n

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

Change-Id: If3dc5ee3db53546feb44fa1b83ade2c6684ece35