Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  379711e7e1653c300817eb048e87b76e9ea931c8

Standardise on 'plumbing'

Be consistent with beta.plumbing, alpha.plumbing etc
Correct trailing ,

Change-Id: I5d5fc1add643875650d01fff3c3288c4e3567071