lib,src: ensure '(node:pid)' prefix for stdout logging

Add '(node:pid)' prefix message for stdout logging

PR-URL: https://github.com/nodejs/node/pull/3833


Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>