Updated mediawiki/extensions
Project: mediawiki/extensions/Echo  aa315ebd903d799be26012aa5b88d560d019845d

Add .jshintrc

Per https://www.mediawiki.org/wiki/CC/JS#Linting. Update a few files to
bring the tests closer to passing.

Change-Id: I08b190e8b44dbdbeb56de5c380d0ed4a8394aca2