Rename PyTorch JNI library to pytorch_jni (#29412)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29412
Originally, this was going to be Android-only, so the name wasn't too
important. But now that we're planning to distribute it with libtorch,
we should give it a more distinctive name.
Test Plan:
Ran tests according to
https://github.com/pytorch/pytorch/issues/6570#issuecomment-548537834
Reviewed By: IvanKobzarev
Differential Revision: D18405207
fbshipit-source-id: 0e6651cb34fb576438f24b8a9369e10adf9fecf9
