LU-3744 llite: use 64bits flags in ll_lov_setea()

In ll_lov_setea(), setting MDS_OPEN_HAS_OBJS to an int flags will
result in the flags being overflowed.

Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Change-Id: I7c623785579d782dd7ce03e0ca291d32ad3952f9
Reviewed-on: http://review.whamcloud.com/7312
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Emoly Liu <emoly.liu@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>