Pre L02 v0.56 upgraded rus vehicle yard has no build list

The russian vehicle yard loses its build list after the upgrade to make light tanks available. All build options disappear and only the commands (move, patrol, repeat on/off, etc) are left.

Also, the flags for some of the yard upgrades are of the wrong faction in some instances (of the top of my head I remember one of the gbr yards had a rus flag).

Noticed this in pre L02 v0.56 and also in the latest svn.

Fixed, thanks.

Thanks for find, fixed yard buildmenu (svn only for now).