Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  84cc6999422ae480f3632fbdd67c4d0d60b17cb1

Hygiene: Use accept attribute in uploads file input tag

This change removes irrelevant options in the Android dialog that asks
for the app that should handle the file input. Previously Android would
display all apps, including the ones that can't be used to select images
(e.g. music related).

Tested on Android Browser 4.1 and 4.2 and it works fine, you can use
camera. We don't support uploads on Android < 4.

Change-Id: I61e056823ff3e82209de483d6d974fef3fcf672c