The new test case would create an empty ext4 with 64K block size, which
can lead to a new data chunk which is no longer 1:1 mapped.
Then convert the fs and verify it with --check-data-csum to make sure
the image file is fine.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>