Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  273a1e6878d8704b8fa55d3ba9a2af736a87ffd1

(bug 45529) use composite indexes on wb_terms.

Based on Sean Pringle's suggestions on bug 45529.

DEPLOYMENT: db schema change, see repo/sql/UpdateTermIndexes.sql

Change-Id: I3cd44a07666511ff836d7439540c29e824024ec4