Updated mediawiki/skins
Project: mediawiki/skins/MonoBook  ff6a01f8447d602b35569bdc5377a1fe3e7f6595

Move MonoBook skin from core

This is the final step of the process described at
<https://www.mediawiki.org/wiki/Separating_skins_from_core_MediaWiki>.

Corresponding core change: Idfc38503.

Change-Id: I83b1efb4a489254c76e0cbda72ff34efa3d41261