add fife & fifechan live ebuilds

As conversation at:
https://bugs.gentoo.org/show_bug.cgi?id=310155
I didn't find any option. I think we can assume, when fifiechan is enabled and Qt4 available atlas gui is build.
Graphics/GUI libraries
fifechan >= 0.1.0
opengl >= 1.3 optional for OpenGL support
Qt4 optional for building Atlas Creator tool
and
--disable-fifechan',
		dest='disable-fifechan',
		help='Disable fifechan gui subsystem',