Port Kineto to AIX

[KamathForAIX]

AIX is a Unix-based operating system used by Power Enterprise hardware. Currently, AIX is porting deep learning frameworks like PyTorch.

Kineto is a submodule for the same. How ever to compile the same in AIX, there are a few changes required to the code.

AIX does not have <sys/syscall.h> and pthread_setname_np ().

We will raise a PR to block them or use an AIX equivalent.

AIX would also like to be part of the Kineto code since we are already ported Pytorch and contribute the changes.

Kindly let us know if we can and what you think of the PR we will raise soon.

Thanks.