Updated mediawiki/extensions
Project: mediawiki/extensions/CirrusSearch  a2bdc23a476e856336cacb9fb102b5828ba70086

Some more tests for phrase rescore.

Basically, these are just more things that I've seen blow up when I had
made mistakes and want to make sure they don't blow up again.

Change-Id: Ifc3fcc2099789fd545556a9339198b6512f602a5