[TVM4J] Upgrade support for NDArray Container

[tqchen]

See #1418

The change is pretty simple

• TVMArrayAlloc now contains a field with type kNDArrayContainer
• Support return value kNDArrayContainer and create an NDArray.

This enables us to get returned NDArray from PackedFunc

[tqchen]

cc @yzhliu

[yzhliu]

I'll look into it tomorrow