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.

Test-Parameters: mdsfilesystemtype=zfs  mdtfilesystemtype=zfs ostfilesystemtype=zfs testgroup=review-zfs
Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: I2530a7a1f7850e31aa99892f5a3e826baf69d20b
Reviewed-on: http://review.whamcloud.com/8979
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>