Localisation updates from https://translatewiki.net.

Change-Id: I1a513376ed80b5596ba035b12b9ee0e3ba136849
Call Linker::link statically (1.18)

Change-Id: Ia47c1b3919ab4788813585c06ed8a93cdbfa496e
Migrate to JSON i18n

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

Change-Id: I066434c2fba4cf3c9af5e39fe930c7ccf8243c07