Updated mediawiki/extensions
Project: mediawiki/extensions/OpenSearchXml  c8cbb735c74240e6e6609d103bfded59918499fd

Migrate to JSON i18n

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

Change-Id: Id21c8d49e2750972245a7faaf86fe55608e03d84