Add Storage Size to fw_dut_info.go

Also reformats output for memory size from KB to GB.

BUG=b:326315770
TEST=manual (go run fw_dut_info.go $HOST)

Change-Id: Iacaf426d083dae2bc9a351d7f12c27a37fc89a0f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/5333856
Reviewed-by: Andrew Luo <aluo@chromium.org>
Commit-Queue: Sean Carpenter <seancarpenter@google.com>
Tested-by: Sean Carpenter <seancarpenter@google.com>
1 file changed