Upload command stats in image_to_usb.sh and cros_package_to_live

We want to keep track of the usage of the scripts.

BUG=chromium:350187
TEST=Ran image_to_usb.sh/cros_package_to_live and view the stats

Change-Id: Ied13533205f37752b0a98401c3e93e5b66e06b57
Reviewed-on: https://chromium-review.googlesource.com/189420
Reviewed-by: David James <davidjames@chromium.org>
Tested-by: Yu-Ju Hong <yjhong@chromium.org>
Commit-Queue: Yu-Ju Hong <yjhong@chromium.org>
2 files changed