pi-gen for Libre Computer boards

This patchset contains changes to boot on Libre Computer boards.

Changes

• Add Libre Computer deb repo
• Add Libre Computer gpg
• Add Libre Computer LTS kernel
• Add X11 configuration
• Add Libre Computer hardware packages
• Add grub-efi bootloader
• Add Libre Computer board bootloader

How to build for specific Libre Computer board

sudo BOARD=aml-s905x-cc ./build.sh

Original README.md

See the original README.md for more information.