am c9f9decd: am 4eea070c: am f702d6d1: Merge "Use aarch64-linux-android-4.9 for arm64 build (attempt #2)"

* commit 'c9f9decdcaa6c3314c11edba0bf9703edf09615e':
  Use aarch64-linux-android-4.9 for arm64 build (attempt #2)