[PyTorch] Investigate early runtime error.

Currently, when using PyTorch with ROCm, you'll notice the following error:

```
import torch
torch.Tensor(1).cuda()

RuntimeError: torch.cuda.sparse.FloatTensor is not enabled.
```

However, the error disappears by executing **torch.cuda._lazy_init()** very early.

```
import torch
torch.cuda._lazy_init()
torch.Tensor(1).cuda()
tensor([ 0], device='cuda:0')
```