util/checklist: Add bootblock support

Scan the boot block when building it with C_ENVIRONMENT_BOOTBLOCK
selected.

TEST=Build and run with Galileo Gen2

Change-Id: I922f761c31e95efde0975d8572c47084b91b2879
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/15130
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
3 files changed