loongson/pypi: links for tf-models-research-object-detection

loongson/mirror tf_models_research_object_detection-2.8.0.post1.tar.gz
loongson/mirror tf_models_research_object_detection-2.8.0.tar.gz
loongson/mirror tf_models_research_object_detection-2.5.0.post2.tar.gz
loongson/mirror tf_models_research_object_detection-2.5.0.post1.tar.gz
loongson/mirror tf_models_research_object_detection-2.5.0.tar.gz