Updated mediawiki/extensions
Project: mediawiki/extensions/Math  b9353836c56d670f99ab53f81b6c4d1cc5dd07ee

Add mathchoice.js to the 'TeX' module

mathchoice.js is necessary for the \mod command. This patch includes it
in the TeX module, so that it is included by ResourceLoader.

Bug: 63621
Change-Id: I624358baee04d396207e87ab81b47718573ea3b3