Ok, now things are getting clearer:All the time you've been talking about the "2nd option: re-flash", while I've been talking about the "1st option: don't re-flash".
It seems to me, that option 2 is a bit harder. Can I do option 2 without actually upgrading the libreboot? I.e. can I jump directly to the section you linked to, "Extract grubtest.cfg from the ROM image"?
