配置NDK standalone 交叉编译环境
    /work/env/android-ndk-r9d/build/tools/make-standalone-toolchain.sh platform=android-14 --install-dir=/work/wepu/Common/NativeDev/android-toolchain --system=linux-x86_64

在环境变量中添加android NDK的交叉编译环境
    export PATH=/work/wepu/Common/NativeDev/android-toolchain/bin:$PATH
    
编译polarssl
    make CC=arm-linux-androideabi-gcc APPS=
    make install DESTDIR=/work/wepu/Common/NativeDev/android-toolchain/sysroot
    
编译rempdump