tools: single, cross-platform tick processor

Currently there are three separate tick processor scripts for
mac, windows, and linux. These have been replaced with a single
node.js script to improve maintainability and remove the need
to preserve parallel logic in these separate places.

PR-URL: https://github.com/nodejs/node/pull/2868


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>