travis: update NDK versions
travis: update NDK versions

watusi/rhodes,watusi/rhodes,rhomobile/rhodes,watusi/rhodes,rhomobile/rhodes,watusi/rhodes,watusi/rhodes,watusi/rhodes,rhomobile/rhodes,watusi/rhodes,rhomobile/rhodes,watusi/rhodes,rhomobile/rhodes,rhomobile/rhodes,watusi/rhodes,rhomobile/rhodes,rhomobile/rhodes,rhomobile/rhodes,watusi/rhodes,rhomobile/rhodes