In some cases, we might want to copy a filesystem as if we were using a
simple 'dd' command, in order to create an exact copy, down to the block
level.
This can be useful in particular when working with dm-verity for
checking the rootfs integrity: that way, we can make a direct copy of
the rootfs and its verity partition and keep the system usable.
This patch adds a new 'rawfs' module to calamares, making possible to
block-copy a filesystem to a block device.
Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
