Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  357f47846b40e7bfd793f88d9d3c0cb47208797b

Makes it easy to create new Jenkins job to run Selenium tests from MobileFrontend repository

Bug: 46219
Change-Id: I86e7b5d3a6fcf212cbaa3b7f35907369380e74a5