Adjust to new filesystem

Mainly a bugfix release!

Fixed in this release:

  • Fixed #13. Moved the deletion of temp files to cleanup phase.
  • Make the removal of display-manager symlink silent in buildarmoem.
  • Don't try to remove display manager symlink on minimal editions. Since they don't have any.
  • Add hostname generation to buildarmimg and to the OEM install script.
  • Fix the long standing issue, where SSL didn't work on images until update-ca-trust was run or ca-certificates was reinstalled.
  • Hopefully fixed bootloader flashing for rockpro64.