add darwin and freebsd binaries to release output
add darwin and freebsd binaries to release output

Signed-off-by: Edward Welch <4e1cbdeb5d169ce17df53d96f1e78e8fa81360a1@grafana.com>

grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki