Build opencv for android

#/bin/shif [ ! -d opencv ];then    git clone https://github.com/Itseez/opencv.git fiexport ANDROID_NDK=/home/duino/Android/Sdk/ndk-bundle# armeabi-v7aif [ ! -d opencv_android ];then    mkdir opencv_androidficd opencv_androidcmake -DANDROID_NATIVE_API_LEVEL=android-25 -DANDROID_ABI=armeabi-v7a -DCMAKE_TOOLCHAIN_FILE=../opencv/platforms/android/android.toolchain.cmake ../opencv/make -j8 && make install# x86_64if [ ! -d opencv_android_x64 ];then    mkdir opencv_android_x64ficd opencv_android_x64cmake -DANDROID_NATIVE_API_LEVEL=android-25 -DANDROID_ABI=x86_64 -DCMAKE_TOOLCHAIN_FILE=../opencv/platforms/android/android.toolchain.cmake ../opencv/make -j8 && make installcp install/* -r ../opencv_android/install/cd ..rm -rf opencv_android_x64