Hygiene: Ship minified CSS

Authored by Mholloway on Thu, Oct 12, 1:51 PM.

Description

Hygiene: Ship minified CSS

Switches the value of 'debug' to false in our ResourceLoader query in
make-css-assets.bash. Note: iOS is already doing this.

https://www.mediawiki.org/wiki/ResourceLoader/Developing_with_ResourceLoader#Toggle_debug_mode

Change-Id: Idd280219e08ac89ffb4cfff3083745a6b8975136