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/platforms/maven/opencv/scripts/execstack_check

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+##################################################################
+#
+#	This script will clear the executable flag on
+#	the specified library and then check it has
+#	been cleared as a separate operation.
+#
+#	$1 - The absolute path to the OpenCV native library.
+#
+#	Returns:
+#	0 - The executable flag has been cleared
+#	1 - The executable flag could NOT be cleared (failure).
+#
+#   Kerry Billingham <contact (at) avionicengineers (d0t) com>
+#   11 March 2017
+#
+##################################################################
+red=$'\e[1;31m'
+green=$'\e[1;32m'
+end=$'\e[0m'
+echo "${green}[INFO] Checking that the native library executable stack flag is NOT set.${end}"
+BINARY=execstack
+$BINARY --help > /dev/null || BINARY=/usr/sbin/execstack
+$BINARY -c $1
+$BINARY -q $1 | grep -o ^-
+if [ $? -ne 0 ]; then
+    echo
+    echo "${red}[ERROR] The Executable Flag could not be cleared on the library $1.${end}"
+    exit 1
+fi
+exit 0