Build script for LinuxBoot SMM PoC

[micgor32]

A simple script to build coreboot with patched LinuxBoot (aka LinuxBootSMM) as a payload. It should allow anyone to reproduce the build without re-configuring coreboot themselves.

[micgor32]

The base is done in #2, the script is fully functional and builds the coreboot image with given configuration and few patches. However, till we do not have the kernel driver implemented, this issue can not be closed, as the new driver will require modifications of the LinuxBootSMM-builder script. To be more specific, the config will certainly require some tweaking.