This patch extracts building/installing/packaging documentation for
meson and make into two separate doc files, and then links these files
from README.
Re-structure README so that it gives only a brief overview of build
instructions and links to full instructions for meson and make.
Ticket: https://ticket.coreboot.org/issues/489
Change-Id: I2d5900538d54c43efcc8c5b7010df5d867f3b190
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/75125
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Peter Marheine <pmarheine@chromium.org>
