NDK各版本下载地址
https://dl.google.com/android/repository/android-ndk-r18b-darwin-x86_64.zip?hl=zh_cn
https://dl.google.com/android/repository/android-ndk-r10e-darwin-x86_64.zip?hl=zh_cn
https://dl.google.com/android/ndk/android-ndk-r9d-darwin-x86_64.tar.bz2