Nightly Armbian 6.16-rc3-edge v0.3

Make first-boot Ethernet driver install more robust

The eth-driver-firstboot.service would sometimes fail on first boot with a "Resource temporarily unavailable" error. This happened when another process had a lock on dpkg.

To fix this, the installation script now waits for any dpkg locks to be released before attempting to install the driver package. It also includes a retry mechanism (3 attempts) in case of a transient failure.