Updated mediawiki/extensions
Project: mediawiki/extensions/Translate  dc8bd483e385745682332e0c7c92c8557bad28d0
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Include priority language information in ApiQueryMessageGroups

ApiQueryMessageGroups returns priority languages as an array optionally
Pass mgprops with 'prioritylangs' to get this.

Change-Id: Ib702fe8d0b78512d617f64cb93d7861b72cfabd8