prepare release

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>
releng: Add an empty machine-id in airootfs

This makes systemd generate a machine-id on early boot and prevents it from thinking we need
any "first boot" setup. We really don't want systemd thinking that, since we carefully prepared
our root file system.

This also ensures every live environment has a unique machine id.
prepare release

Signed-off-by: Thomas Bächler <thomas@archlinux.org>
[archiso] Change cowfile_size= behavior

Move from percent to explicit size and set a default of 256M (sparse)

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>