[S] Change in coreboot[master]: Makefile.inc: Support FILENAME-REGION-compression CBFS flag

[Jérémy Compostella (Code Review)]

Attention is currently required from: Martin L Roth.

Hello Martin L Roth, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/77230?usp=email

to look at the new patch set (#4).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: Makefile.inc: Support FILENAME-REGION-compression CBFS flag
......................................................................

Makefile.inc: Support FILENAME-REGION-compression CBFS flag

The `FILENAME-REGION-compression' CBFS flag allows to specify a
compression algorithm per REGION.  Similarly, to `-align' or
`-position', it overrides the `FILENAME-compression' flag for a
particular `REGION'.

It can be use to set the compression to `none' for a particular region
in which the file is going to be used in pre-memory stages without
alterating the more desired compressed version for other regions.

BUG=b:279173035
TEST=Verified that with `vtb.bin-COREBOOT-compression := none' the
     vbt.bin in the COREBOOT region is not compressed.

Change-Id: I4e3b827407aeca60f27270ee5d3fa606047a80d5
Signed-off-by: Jeremy Compostella 
---
M Documentation/getting_started/build_system.md
M Makefile.inc
2 files changed, 17 insertions(+), 10 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/30/77230/4