Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  21a9426c2c417afdd2c679e90a08e48c2ae571cf

Ensure mw.user is available to WikiGrok

Avoid undefined issues on startup when debug=true

Change-Id: Ic4c60ac561bb16cf402de5f35fec7f02702f8ddc