update_kernel: Allow specifying multiple remote hosts

The hosts will be updated in parallel.

BUG=None
TEST=update_kernel.sh --remote=host1,host2

Change-Id: Ie4fe63030906f28b5d14405487e04e9b058f8758
Reviewed-on: https://chromium-review.googlesource.com/170801
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Olof Johansson <olofj@chromium.org>
Commit-Queue: Doug Anderson <dianders@chromium.org>
1 file changed