Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  a0a3f3df3e68a63adab56deabe3ccd25d4c5a4c0

add test case for UnDeserializableValue in snak formatter builders

- also fix assumption about message language

Change-Id: Id516cb2907a6a02570ef0f538d5593c378a8802d