Updated mediawiki/extensions
Project: mediawiki/extensions/MediaFunctions  8f5a2f4d1b95ea5df0a7f21b8794d37c0aae7036

Call Linker::formatSize statically

The bumps the required MediaWiki version to 1.18.

Change-Id: I1914b369049b96354187b16ef7def776337c9b3f