syncop: copy inode pointer in readdirplus

Change-Id: I9ab2b8ac2da9fe13f56b8b08f715a0b603ece0cb
BUG: 953694
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/5161
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>