Add also 'e2fsprogs-tune2fs' to the image, as busybox's version of
tune2fs command does not support setting the "encrypt" feature of the
EXT4 filesystem.
Signed-off-by: Mike Engel <Mike.Engel@digi.com>
Signed-off-by: Javier Viguera <javier.viguera@digi.com>