LU-5203 zfs: Update spl/zfs version to 0.6.3

LU-5203 zfs: Update spl/zfs version to 0.6.3

Update SPL and ZFS version to official 0.6.3.
This also fixes the "search path" for libzfs.so.

Lustre-commit: 1f5fa56a0b824e684c32d382d0108c92d9125c5a
Lustre-change: http://review.whamcloud.com/8979

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Change-Id: I710d254d93ce9c3db64ab4bf250f8bf556c684aa
Reviewed-on: http://review.whamcloud.com/11298
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>