modify prepare_data.sh for benchmark
#!/bin/bash
+dataset_url=$1
cd dataset
rm -rf ILSVRC2012
-wget -nc https://paddle-imagenet-models-name.bj.bcebos.com/data/whole_chain/whole_chain_little_train.tar
-tar xf whole_chain_little_train.tar
-ln -s whole_chain_little_train ILSVRC2012
+wget -nc ${dataset_url}
+tar xf ILSVRC2012_val.tar
+ln -s ILSVRC2012_val ILSVRC2012
cd ILSVRC2012
-mv train.txt train_list.txt
-mv val.txt val_list.txt
+ln -s val_list.txt train_list.txt
cd ../../
