Change in coreboot[master]: Makefile.inc: Add bootblock to CBFS before others

[Julius Werner (Code Review)]

Attention is currently required from: Yu-Ping Wu.
Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/64547 )

Change subject: Makefile.inc: Add bootblock to CBFS before others
......................................................................

Patch Set 4:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/64547/comment/b8ef740b_7832e818 
PS2, Line 9: cbfstool
> > Hrmm, should we maybe think if a different way of locating the metadata? […]

The problem is that it still needs to be updated again every time a new CBFS file is added. We want images where even after the coreboot build system is done with them, you can still run `cbfstool add` to put more files in them (e.g. an out-of-tree payload) without breaking the verification chain. I think the only way that can work is if cbfstool knows how to find and update the bootblock in place, wherever it is on each platform.