Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  af662b6ccd417716fd87dbe6c6ae4912cc0d4ee3

Fix check for wrong version.

WikibaseClient was bailing out in case WBL_VERSION was set,
instead of checking WBC_VERSION.

Change-Id: Ieb7530549e6bbf4bbc3b88e52ec6604acb2db93f