update_kernel: Only check buildID if rebooting

If we're not rebooting, the buildID check is pointless.

BUG=none
TEST=./update_kernel ... --noreboot

Change-Id: I178ea907060102b108b4ca1bc280cd88281147df
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3489914
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Commit-Queue: Brian Norris <briannorris@chromium.org>
1 file changed