Add Batocera PortMaster, Update Recalbox to 9.2.1

[CoryManson]

• Adds PortMaster to Batocera Image:
  • Descent Preinstalled with shareware/demo version: https://portmaster.games/detail.html?name=descent&devices=
• Set packer version to 1.10.3 (Later versions currently not working https://github.com/mkaczanowski/packer-builder-arm/issues/359)
• Update Recalbox to 9.2.1 (Recalbox don't seem to store any old versions publicly so the only thing we can do is fail forward when a new image is released)