Update first stage to be compatible with new Macs

* Mark first stage loader compatible with new MacOS9-free PowerMacs so
  it will be accepted by OpenFirmware.
* Update copyrights to include 2003.
* Version 1.3.9-UNRELEASED.
git-archimport-id: erbenson@alaska.net--public/yaboot--devel--1.3--patch-47
12 files changed