Update zfs to 0.8.1
Update zfs to 0.8.1

Since SPL is included in the ZFS repo from 0.8.0 this change will not be backwards compatible.

Signed-off-by: Björn Ingeson <ca06ac4f7ff62e23f4886aabafed87c6bbfdc6ac@gmail.com>

justincormack/linuxkit,furious-luke/linuxkit,konstruktoid/linuxkit,djs55/linuxkit,linuxkit/linuxkit,rn/linuxkit,deitch/linuxkit,konstruktoid/linuxkit,justincormack/linuxkit,yankcrime/linuxkit,yankcrime/linuxkit,yankcrime/linuxkit,konstruktoid/linuxkit,JohnnyLeone/linuxkit,linuxkit/linuxkit,JohnnyLeone/linuxkit,deitch/linuxkit,JohnnyLeone/linuxkit,furious-luke/linuxkit,konstruktoid/linuxkit,rn/linuxkit,JohnnyLeone/linuxkit,justincormack/linuxkit,furious-luke/linuxkit,justincormack/linuxkit,yankcrime/linuxkit,yankcrime/linuxkit,linuxkit/linuxkit,linuxkit/linuxkit,furious-luke/linuxkit,yankcrime/linuxkit,konstruktoid/linuxkit,rn/linuxkit,djs55/linuxkit,konstruktoid/linuxkit,rn/linuxkit,deitch/linuxkit,JohnnyLeone/linuxkit,furious-luke/linuxkit,deitch/linuxkit,djs55/linuxkit,justincormack/linuxkit,justincormack/linuxkit,djs55/linuxkit,rn/linuxkit,djs55/linuxkit,linuxkit/linuxkit,deitch/linuxkit