Updated mediawiki/extensions
Project: mediawiki/extensions/CheckUser  7b8d67951f349288d99a84a20963a418216a21c8

Clean up jslint errors

Still a bunch of issues, but jshint doesn't care.

Bug: 61589
Change-Id: Iac49c7fd95f3ca0da51e8cceb8acb6701fe84373