[coreboot] ASUS C200 Chromebook

[John Lewis]

Hi Guys, long time no speak.

I'm building a ROM for the subject using ChromiumOS coreboot with the 
relevant branch, and I'm just wondering if the external reference code 
binary is needed?

It builds okay without it (commenting out ChromeOS specific bits that it 
complains about), and I can even get it to compile cleanly with the 
option enabled. However, I can't seem to correctly extract the binary 
from the shell-ball ROM using cbfstool, because at build time, it 
complains "E: The stage file is not in ELF format!". Can one of you 
point me in the right direction?

Thanks,

John.