see #josm10171 - new icon for `landuse=farmland` (modified icon proposed by Bulwersator, based on work of Madboy74, license GPL v2 or later)

git-svn-id: http://svn.openstreetmap.org/applications/share/map-icons@30654 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4