feat(besadii): Implement support for Buildkite's post-command hook r/1127

This hook is invoked by Buildkite (on the runner) after every build
stage. This change adds support in Besadii to run as this hook and
update the build status on a Gerrit CL.

Change-Id: Ie07a94d9b41645a77681cf42f6969d218abf93c1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/761
Tested-by: BuildkiteCI
Reviewed-by: Kane York <rikingcoding@gmail.com>

0 files changed, 0 insertions, 0 deletions