Updated mediawiki/extensions
Project: mediawiki/extensions/WikimediaMessages  a5949cd5cabd66c29c86c9dfc51e3f3ee56327b4

Restore wikidata-copyright message... still needed

it is used in WikimediaMessages by a hook

Change-Id: Id6d6e8e4bc74e3df974ed32637b38e14274144f8