Merge pull request #129 from yongqiangma/v28

update libs to paddle-lite v2.8

Author: yongqiangma

PaddleLite-ios-demo/download_dependencies.sh

@@ -4,7 +4,7 @@ tempdir=$(mktemp -d)
 
 CLASSIFICATION_MODEL_URL="https://paddlelite-demo.bj.bcebos.com/models/mobilenet_v1_fp32_224_for_cpu_v2_8_0.tar.gz"
 DETECTION_MODEL_URL="https://paddlelite-demo.bj.bcebos.com/models/ssd_mobilenet_v1_pascalvoc_fp32_300_for_cpu_v2_8_0.tar.gz"
-PADDLE_LITE_LIB_URL="https://github.com/PaddlePaddle/Paddle-Lite/releases/download/v2.8/inference_lite_lib.ios.armv8.with_extra.tiny_publish.tar.gz"
+PADDLE_LITE_LIB_URL="https://paddlelite-demo.bj.bcebos.com/libs/ios/paddle_lite_libs_v2_8_0.tar.gz"
 OPENCV_FRAMEWORK_URL="https://paddlelite-demo.bj.bcebos.com/libs/ios/opencv2.framework.tar.gz"