examples: benchmark_rate.py: Add ?x_stream_args args

This allows adding stream args to the Python version of benchmark_rate
in the same way as for the C++ version, e.g.:

python3 ./benchmark_rate.py \
    --args addr=192.168.40.2,num_poll_offload_threads=4 \
    --rx_stream_args \
        recv_offload=1,num_recv_frames=32,recv_offload_wait_mode=poll \
    --tx_stream_args \
        send_offload=1,num_send_frames=32,send_offload_wait_mode=poll \
    [... other arguments ...]

0 files changed, 0 insertions, 0 deletions