Updated mediawiki/extensions
Project: mediawiki/extensions/SiteMetrics  8c20093652bce233bbea0c59eace596390877ce4

Migrate to JSON i18n

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

Change-Id: I6e871be35ab7614e0f37bb533d4ccec7ed55ce10