OWNERS: Add crosvm-bot
OWNERS: Add crosvm-bot

This should allow the bot to submit dry-runs to the CQ.

BUG=chromium:1290646
TEST=None

Change-Id: I44fc74c94129e7d136a161c1ba11445d7bf675c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3421730
Reviewed-by: Daniel Verkamp <72bc170b46ec491f7bdd4359a1c0bfed274de40c@chromium.org>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

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