图片压缩, android studio编译libjpeg, libjpeg-turbo

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1. android studio 配置 cmake ndk16 编译环境[ndk17废弃armeabi架构]
2. 下载libjpeg[https://github.com/libjpeg-turbo/libjpeg-turbo]
3. android studio新建空工程, 在app主目录下新建jni目录, 将libjpeg放入jni目录
4. android studio app目录右键选择Link C++ Project With Gradle, 添加jni目录CMakeLists.txt文件
5. app moudle下build.gradle文件, 配置cmake编译文件
        ndk {
            abiFilters 'armeabi', 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64', 'arm64-v8a', 'mips', 'mips64'
        }
5. ide选项, Build => Make Project,

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