Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  2a2493875f543554dcda60210897a99303b2e268

More descriptive error messages

About 22% of our errors (347/1608)
are due to Missing filename - let's look at
warnings to work out the real cause

Change-Id: Ifeba2a97abe86824472b51bb1dcd54ad16bdd6d2