Torch-scatter for both ppc and x86

[JanakiSheth]

Hello,

Please include torch-scatter in the powerai channel. I would appreciate if you could package 1.3.2 first, we are pinned at that dependency for our project.

Name of package: Torch-scatter
URL of package source code: https://github.com/rusty1s/pytorch_scatter/tree/1.3.2
License of package: MIT
Dependencies:
cuda
torch>=1.1

Short description of package and use case(s):
An open-source library of highly optimized sparse update (scatter) operations for the use in PyTorch.