puppet-compiler: module for installation

This module installs the puppet compiler. It should then be runnable
using the puppet-compiler command. Note that this module does NOT
install the facts collection as this is mainly intended to run in labs,
where production facts can be used only after being cleaned of sensitive
data.

Change-Id: I07f46fe66b994d345a97cfc75345bfa2e5311ff2
Signed-off-by: Giuseppe Lavagetto <glavagetto@wikimedia.org>