Add a ./bin/aphlict build workflow.

Summary:
Currently, it is a bit tricky to build the Aphlict client SWF from the ActionScript source. Provide a ./bin/aphlict build workflow that simplifies this process.

Depends on D9226.

Test Plan:
Executed the workflow:

> ./bin/aphlict build
Done.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9338