Updated mediawiki/extensions
Project: mediawiki/extensions/DonationInterface  f5fdabae1cd5b39f987c88248afdd49a9221de83

Make sure we always create UTF-8 XML

WorldPay really doesn't like entities -- but it's totally fine
with proper UTF-8 strings.

Change-Id: I24c71710cbda047e0abef8c31fe964b19ffbc3cb