Add sync packages

Before installing in packages in chroot environment, it helps to sync package
databases
Use `dd` to install syslinux bootloader

The included script wasn't working for gpt partitions
Move root partition in default syslinux config

Because we are putting a 2Mi BIOS boot partition, it's consuming a partition
number and as such, we need to update this file to point to the correct
partition
Add nfs-utils to necessary packages
Add default initial resolv.conf
Change package state to latest
Merge local 'develop' with remote 'develop'