Updated mediawiki/extensions
Project: mediawiki/extensions/ContentTranslation  73bc3be57e38f5d5a71d9a175cd46cfd903e9490

Add ext.cx.model as dependency to SiteMapper and util

ext.cx.sitemapper and ext.cx.util both use mw.cx,
which is initialized in ext.cx.model.

Change-Id: Icdcb489ccdc2b726755eb558f6ed386b846f66b7