[Misc] Fix Opencv Download URL Invaild (#457)

* add proxy for github download onnxruntime

* update code to fix potential bug of half vector

* update opencv download url

Author: wangzijian1010

cmake/opencv.cmake

@@ -2,8 +2,8 @@ set(OpenCV_Version "4.9.0-ffmpeg4.2.2" CACHE STRING "OpenCV version" FORCE)
 set(OpenCV_DIR ${THIRD_PARTY_PATH}/opencv)
 # download from github if opencv library is not exists
 if (NOT EXISTS ${OpenCV_DIR})
-    set(OpenCV_Filename "opencv-${OpenCV_Version}-linux-x86_64.tgz")
-    set(OpenCV_URL https://github.com/DefTruth/lite.ai.toolkit/releases/download/v0.2.0-rc0/${OpenCV_Filename})
+    set(OpenCV_Filename "opencv.tar.gz")
+    set(OpenCV_URL https://ghfast.top/https://github.com/xlite-dev/lite.ai.toolkit/releases/download/v0.0.1/opencv.tar.gz)
     message("[Lite.AI.Toolkit][I] Downloading library: ${OpenCV_URL}")
     download_and_decompress(${OpenCV_URL} ${OpenCV_Filename} ${OpenCV_DIR}) 
     create_ffmpeg_syslinks_if_not_found(${OpenCV_DIR}/lib)