Updated mediawiki/extensions
Project: mediawiki/extensions/PdfHandler  90562880a8e0d378cff831d130229a3b1660eeca

Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: Iaa3596f5bf98ace673f108c65d572454ee3fe642