[WIP PATCH 2/2] SDL support

[Vladimir 'phcoder' Serbinenko]

Hello here I have a preliminary SDL support. With this WIP patch you
have to add LD_FLAGS=-lSDL to configure command. Another two problems
are that window is never repainted and input still has to go to
terminal window
This will of course be fixed in the next patch just that I knew that
debugging video in grub-emu could help Collin with gfxmenu I release
this early.
@Pavel Roskin: could I perhaps create a personal named branch(es) in
your git mirror so that I could expose my works as they progress?

-- 
Regards
Vladimir 'phcoder' Serbinenko

sdlvideo.diff
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