Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  43e8178003f00402878d470726d5c343ccf22a8f

Standardise (again) on MEDIAWIKI_URL

It now includes the trailing slash as QA needs this:
export MEDIAWIKI_URL=http://localhost.m/w/index.php/

Change-Id: Icb08a29c2e039763f47244fcc49fc45058657e7d