cgpt: show: Print partition size with 64-bit format
cgpt: show: Print partition size with 64-bit format

Partition size on 4TB drive can overflow 32-bit integers. Running "cgpt
show /dev/sda" prints negative number for the state partition (sda1).

BRANCH=none
BUG=none
TEST=Run "cgpt show /dev/sda" with 4TB drive.

Change-Id: I56f3b43594028695745de8c5a1626d940a3b4c5b
Reviewed-on: https://chromium-review.googlesource.com/546879
Commit-Ready: Erdi Chen <58d6bc54802ff3a6c34aec0ef4aad36b19c4b6c2@google.com>
Tested-by: Erdi Chen <58d6bc54802ff3a6c34aec0ef4aad36b19c4b6c2@google.com>
Reviewed-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

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