libmix: support Kbuf handle buffer sharing mode

BZ: 27501

support Kbuf handle buffer sharing mode
Signed-off-by: Weian Chen <weian.chen@intel.com>

Change-Id: Ic766a4e0d91cb9d8ebe48cea5a82c65fe7676d42
Reviewed-on: http://android.intel.com:8080/39155
Reviewed-by: Tao, Tao Q <tao.q.tao@intel.com>
Reviewed-by: Verdu, Miguel <miguel.verdu@intel.com>
Reviewed-by: Poornachandran, Rajesh <rajesh.poornachandran@intel.com>
Reviewed-by: Chen, Weian <weian.chen@intel.com>
Tested-by: Sun, Hang L <hang.l.sun@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
3 files changed