[Enhance]: Better support yolov3 pytorch2onnx (#4083)
[Enhance]: Better support yolov3 pytorch2onnx (#4083)

* Make yoloV3 raw export work with TensorRT

* Change bool indexing to integer indexing

* Add comments to changes

* Add comments to changes

Co-authored-by: Daniel Suess <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@dsuess.me>
open-mmlab/mmdetection,open-mmlab/mmdetection