Make font-patcher Python 3 compatible.
Make font-patcher Python 3 compatible.

Fedora's fontforge modules only work on Python 3. The small changes in
this patch make font-patcher work on Python 3 so I can run the script on
Fedora (26 at least, I don't know about older versions)

ryanoasis/font-nerd-icons,ryanoasis/font-nerd-icons