feat: 切换后端至PaddleOCR-NCNN，切换工程为CMake

1.项目后端整体迁移至PaddleOCR-NCNN算法，已通过基本的兼容性测试
2.工程改为使用CMake组织，后续为了更好地兼容第三方库，不再提供QMake工程
3.重整权利声明文件，重整代码工程，确保最小化侵权风险

Log: 切换后端至PaddleOCR-NCNN，切换工程为CMake
Change-Id: I4d5d2c5d37505a4a24b389b1a4c5d12f17bfa38c

3rdparty/opencv-4.5.4/modules/gapi/test/gapi_compile_args_tests.cpp

@@ -0,0 +1,75 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+//
+// Copyright (C) 2020 Intel Corporation
+
+
+#include "test_precomp.hpp"
+
+namespace opencv_test
+{
+    struct CustomArg
+    {
+        int number;
+    };
+}
+
+namespace cv
+{
+    namespace detail
+    {
+        template<> struct CompileArgTag<opencv_test::CustomArg>
+        {
+            static const char* tag() { return "org.opencv.test.custom_arg"; }
+        };
+    }
+}
+
+
+namespace opencv_test
+{
+namespace
+{
+G_TYPED_KERNEL(GTestOp, <GMat(GMat)>, "org.opencv.test.test_op")
+{
+    static GMatDesc outMeta(GMatDesc in) { return in; }
+};
+
+GAPI_OCV_KERNEL(GOCVTestOp, GTestOp)
+{
+    static void run(const cv::Mat &/* in */, cv::Mat &/* out */) { }
+};
+} // anonymous namespace
+
+TEST(GetCompileArgTest, PredefinedArgs)
+{
+    cv::gapi::GKernelPackage pkg = cv::gapi::kernels<GOCVTestOp>();
+    cv::GCompileArg arg0 { pkg },
+                    arg1 { cv::gapi::use_only { pkg } },
+                    arg2 { cv::graph_dump_path { "fake_path" } };
+
+    GCompileArgs compArgs { arg0, arg1, arg2 };
+
+    auto kernelPkgOpt = cv::gapi::getCompileArg<cv::gapi::GKernelPackage>(compArgs);
+    GAPI_Assert(kernelPkgOpt.has_value());
+    EXPECT_NO_THROW(kernelPkgOpt.value().lookup("org.opencv.test.test_op"));
+
+    auto hasUseOnlyOpt = cv::gapi::getCompileArg<cv::gapi::use_only>(compArgs);
+    GAPI_Assert(hasUseOnlyOpt.has_value());
+    EXPECT_NO_THROW(hasUseOnlyOpt.value().pkg.lookup("org.opencv.test.test_op"));
+
+    auto dumpInfoOpt = cv::gapi::getCompileArg<cv::graph_dump_path>(compArgs);
+    GAPI_Assert(dumpInfoOpt.has_value());
+    EXPECT_EQ("fake_path", dumpInfoOpt.value().m_dump_path);
+}
+
+TEST(GetCompileArg, CustomArgs)
+{;
+    cv::GCompileArgs compArgs{ GCompileArg { CustomArg { 7 } } };
+
+    auto customArgOpt = cv::gapi::getCompileArg<CustomArg>(compArgs);
+    GAPI_Assert(customArgOpt.has_value());
+    EXPECT_EQ(7, customArgOpt.value().number);
+}
+} // namespace opencv_test