LU-2148 mount: Kernel update for latest FC18 kernel

LU-2148 mount: Kernel update for latest FC18 kernel

Upstream kernel has hidden the mount gut. So get rid
of mount.h dependence. Then we can build patchless
client using kernel-devel rpms for FC18.

Signed-off-by: yang sheng <ys@whamcloud.com>
Change-Id: I53c6b56cee8276afc2a5ebc61d9199fbef1edfc9
Reviewed-on: http://review.whamcloud.com/4741
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Peng Tao <bergwolf@gmail.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>