[coreboot] x86emu boot message

[ron minnich]

I kind of remember how this works, but you can confirm it. The issue
is that you are going to emulate a hunk of code which expects to
return.

How do you do this? I am pretty sure the emulator fakes a call to the
vga rom entry point, and places a hlt instruction after that call, so
that when the call returns, you get a halt and a dramatic message.
Possibly this message could be a little less stress-inducing :-)

ron