Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  db4791c475c2fc2cc64203b22347a3325fd38f16

Re-add .jshintignore

We need to have an empty .jshintignore, otherwise MediaWiki's is used which
ignores everything in extensions/.

Change-Id: I828dae1d24ef6c047d68bfcf1752f528bb73bac6