Add --numactl_bind flag to H2D benchmark script

Author: leonardchan

Ironwood/scripts/run_host_device_benchmark.sh

@@ -13,6 +13,7 @@ usage() {
     echo "  --config <path>       Path to specific config file (optional)"
     echo "  --numactl_bind        Run with numactl --cpunodebind=0 --membind=0"
     echo "  --interleaved         Run with numactl --interleave=all"
+    echo "  --numactl_bind        Run with numactl --cpunodebind=0 --membind=0"
     echo "  --help                Show this help message"
     exit 1
 }