This code was previously in our fork of RocksDB. Move it here
so that API breaking changes can update it.
Change-Id: Icae3e22380b9bd3de8c1ec5b6f82909f812d204b
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/364531
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
