update_kernel: Fix BuildID Check for manatee.

It was comparing hypervisor kernel BuildId against the live CrOS kernel.

BUG=b:219653335
TEST=./update_kernel.sh --remote  localhost --ssh_port 2230 \
  --ab_update --bootonce --board=volteer-manatee

Change-Id: I3f53051479194d73e3a02d85a7e849168950bddf
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3466676
Tested-by: Junichi Uekawa <uekawa@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Commit-Queue: Junichi Uekawa <uekawa@chromium.org>
1 file changed