[gentoo-releng] Patch for gk_args in livecd specs

[Ben Kohler]

I've attached a patch for your review.  I do not believe that our livecd 
initramfs needs support for mdraid, dmraid, and lvm volumes, for any 
reason.  I propose that we remove it, to save some build time and iso 
size, and to decrease chance of random build failures down the line.

If anyone can think of any reason this support needs to stay, I'd love 
to hear about it.

Thanks,

Ben