bdb: Enable futility-show to dump more header info
bdb: Enable futility-show to dump more header info

This change makes futility show command dump more information
of the BDB header.

BUG=chromium:649554
BRANCH=none
TEST=make runtests
$ futility show --type bdb ~/tmp/rotor/bin/coreboot.rom

Change-Id: I8a10ed03b673879ab80f777b34863e670d37cd8c
Signed-off-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/399061
Reviewed-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>

coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot