Do you have libreboot_bin or the source?
With the bin you can't build it, as there is no source.
The part you need from the documentation is right after:
>>>
Look in libreboot_src/bin (if you just built the ROM's) or libreboot_bin/bin
and copy the ROM into libreboot_bin/flashrom or libreboot_src/flashrom
(depending on which one you want to use), renaming the copy to
'coreboot.rom'.
Flash it!
$ sudo ./flashrom -p internal -w coreboot.rom
If it complains about 3 Macronix flash chips (on the ThinkPad X60) detected
then do that:
$ sudo ./flashrom -p internal -w coreboot.rom -c "MX25L1605D/MX25L1608D"
You don't have to flash the default coreboot.rom; there are other ROM's
aswell, so look at the list below.
You should see "VERIFIED" written at the end of the flashrom output.
If so, SHUT DOWN FULLY! DO NOT RESTART - YOU NEED TO SHUT DOWN *FULLY*. THAT
IS, *POWER OFF*! WAIT A FEW SECS, THEN BOOT!
Recommended ROM's to flash:
ThinkPad X60 (./bin/x60): US Qwerty keyboard, no dock: coreboot.rom
ThinkPad X60 (./bin/x60): US Dvorak keyboard, no dock:
coreboot_dvorak.rom
ThinkPad X60 (./bin/x60): US Qwerty keyboard, with dock:
coreboot_serial.rom
ThinkPad X60 (./bin/x60): US Dvorak keyboard, with dock:
coreboot_serial_dvorak.rom
ThinkPad X60 (./bin/x60): UK Qwerty keyboard, no dock:
coreboot_ukqwerty.rom
ThinkPad X60 (./bin/x60): UK Dvorak keyboard, no dock:
coreboot_ukdvorak.rom
ThinkPad X60 (./bin/x60): UK Qwerty keyboard, with dock:
coreboot_serial_ukqwerty.rom
ThinkPad X60 (./bin/x60): UK Dvorak keyboard, with dock:
coreboot_serial_ukdvorak.rom