tools: add Boxstarter script

Adds a Boxstarter script for easy Node.js building prerequisites installation

PR-URL: https://github.com/nodejs/node/pull/17046


Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: João Reis <reis@janeasystems.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>