add params.txt for ocr det kl quant

tests/ocr_kl_quant_params.txt

+===========================train_params===========================
+model_name:ocr_system
+python:python3.7
+gpu_list:null
+Global.use_gpu:null
+Global.auto_cast:null
+Global.epoch_num:null
+Global.save_model_dir:./output/
+Train.loader.batch_size_per_card:null
+Global.pretrained_model:null
+train_model_name:null
+train_infer_img_dir:null
+null:null
+##
+trainer:
+norm_train:null
+pact_train:null
+fpgm_train:null
+distill_train:null
+null:null
+null:null
+##
+===========================eval_params=========================== 
+eval:null
+null:null
+##
+===========================infer_params===========================
+Global.save_inference_dir:./output/
+Global.pretrained_model:
+norm_export:null 
+quant_export:null 
+fpgm_export:null 
+distill_export:null
+export1:null
+export2:null
+##
+infer_model:./inference/ch_ppocr_mobile_v2.0_det_infer/
+kl_quant:deploy/slim/quantization/quant_kl.py -c configs/det/ch_ppocr_v2.0/ch_det_mv3_db_v2.0.yml  -o  
+infer_quant:True
+inference:tools/infer/predict_det.py
+--use_gpu:TrueFalse
+--enable_mkldnn:True|False
+--cpu_threads:1|6
+--rec_batch_num:1
+--use_tensorrt:False|True
+--precision:fp32|fp16|int8
+--det_model_dir:
+--image_dir:./inference/ch_det_data_50/all-sum-510/
+--save_log_path:null
+--benchmark:True
+null:null