Fix hello-jni to use multi_abis to avoid "all", which is reserved and will be included for every flavors to build ( it means common to all flavours)
Fix hello-jni to use multi_abis to avoid "all", which is reserved and
will be included for every flavors to build ( it means common to all flavours)

ggfan/android-ndk,ggfan/android-ndk,claywilkinson/android-ndk,claywilkinson/android-ndk,android/ndk-samples,ggfan/android-ndk,ggfan/android-ndk,claywilkinson/android-ndk,claywilkinson/android-ndk,android/ndk-samples,android/ndk-samples,ggfan/android-ndk,android/ndk-samples,android/ndk-samples