Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  c0eb39d604320511337ab81cc5dedc886814308e

Hygiene: Use group as a parameter to phpunit

--group at the end of the line is interpreted as a file in my environment,
which results in the error "Cannot open file "--group".". This change
solves this.

Change-Id: I70953e1e27b4313313295bb989ebcb44df42a1db