Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  9b3f9d6128b62c58054aad438cbec652b79e4a2b

Fix fatal for non-existent users on SpecialMobileContributions

Also remove superfluous $out variable

Change-Id: I53f61be86ae100ebf9e9faf44ab1dbecb5f595fc