add fife & fifechan live ebuilds

As conversation at:
https://bugs.gentoo.org/show_bug.cgi?id=310155
I think we don't need sdl USE https://github.com/fifengine/fifengine/wiki/dependencies
There is nothing regarding SDL during checking/building process https://github.com/fifengine/fifengine/blob/master/SConstruct , so not USE since it doesn't change building process.