Updated mediawiki/extensions
Project: mediawiki/extensions/Mantle  dfa78b613d3ea2e676819ab30f66a8f350bef14d

Hygiene: Documentation updates

* Point QUnit command line tool to only run Mantle tests
* Update ResourceLoaderTemplateModule with documentation recently added in
mobile
* Update documentation of eventemitter to reflect change in MobileFrontend
* Update view to refer to Mantle

Change-Id: If582ecbff2327e3e41548d2c8fc8d6137cf2f073