New port: x11-themes/gnome-icons-luv

Luv is the spiritual successor to Flattr, a flat but complex icon
theme for freedesktop environments. Flattr was an icon theme for
desktops, the set is inspired by the latest flat design trend.

WWW: https://github.com/NitruxSA/luv-icon-theme

PR: 223792
Submitted by: Michael Danilov <mike.d.ft402@gmail.com> (based on)