build: introduce ci targets for lint/benchmark

Introduce two new targets we will populate with actions
once merged into all branches we need to support through CI.

PR-URL: https://github.com/nodejs/node/pull/5921


Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: João Reis <reis@janeasystems.com>
Reviewed-By: James M Snell <jasnell@gmail.com>