silence live_update run() commands

[nicks]

Describe the Feature You Want

Michael writes in the tilt channel:

when using the run option with LiveUpdates to run a command in a container after files are synced, is there a way to not have the command being run printed into the logs? We're running a fairly long curl command and we don't need it printed out in the logs if there's an easy way to suppress that.

i don't think there's a way to do this right now but might not be too hard to add.