Updated mediawiki/extensions
Project: mediawiki/extensions/ProofreadPage  fe12a60996bb44d895392b5968a08fd07db79ffe

(bug 49453) Fix sql table creation failure

Move the ProofreadPage.sql schema to includes/index/ProofreadIndex.sql:
* this is more logical since it creates a table for the index pages
* this fixes bug 49453 since the schema is now located in the right folder

Change-Id: I2921e6408940dcf23b3f148a7034cd76304d3610