BugLink: https://bugs.launchpad.net/bugs/1599257

Sync kernel with changes in spl 0.6.5.6-0ubuntu4

This delta just updates the spl splat test module (which is just
used for regression testing), no core spl functionality is changed.
The sync also pulls in some redhat spec files that landed in spl
since the last sync, this are not used either but are included by
the automated sync scripts.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>