merge-into-chromeos: Set Bot-Commit+1 as well
merge-into-chromeos: Set Bot-Commit+1 as well

This is an experiment to figure out the permissions needed by
crosvm-bot.
See https://crbug.com/1289780 for details.

BUG=chromium:1289780
TEST=None

Change-Id: Ic202532ceaa2b0d86f51c8670137bde2d8f16868
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3419296
Reviewed-by: Daniel Verkamp <72bc170b46ec491f7bdd4359a1c0bfed274de40c@chromium.org>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

google/crosvm,google/crosvm,google/crosvm,google/crosvm