最新版本r16
https://dl.google.com/android/repository/android-ndk-r16-windows-x86.zip
https://dl.google.com/android/repository/android-ndk-r16-windows-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r16-darwin-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r16-linux-x86_64.zip
历史版本：
https://dl.google.com/android/repository/android-ndk-r15c-windows-x86.zip
https://dl.google.com/android/repository/android-ndk-r15c-windows-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r15c-darwin-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r15c-linux-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r14b-windows-x86.zip
https://dl.google.com/android/repository/android-ndk-r14b-windows-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r14b-darwin-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r14b-linux-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r13b-windows-x86.zip
https://dl.google.com/android/repository/android-ndk-r13b-windows-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r13b-darwin-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r13b-linux-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r12b-windows-x86.zip
https://dl.google.com/android/repository/android-ndk-r12b-windows-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r12b-darwin-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r12b-linux-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r11c-windows-x86.zip
https://dl.google.com/android/repository/android-ndk-r11c-windows-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r11c-darwin-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r11c-linux-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r10e-windows-x86.zip
https://dl.google.com/android/repository/android-ndk-r10e-windows-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r10e-darwin-x86_64.zip
https://dl.google.com/android/repository/android-ndk-r10e-linux-x86_64.zip