Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  5705e5edd08540a0b4fd6691a1099b354b8012f3

Un-hardcoding About and Disclaimer links

Making them work the same (roughly) as desktop site.

Also removing unused i18n messages.

Bug: 54066
Change-Id: Id53fcb7dbce85caa555466042cb1148c8aebf88a