Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  4dc8ec2669e5eebb664c7d971720fabfe65c778b

Track the most recent upload time for duration events

This will allow us to see if images uploaded recently, which have been
subjected to thumbnail prerendering, load faster.

Change-Id: I4ce358ff54e4ca4e290349aa3ff4810ad4714d24
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/975