torch.randperm does not respect TH_INDEX_BASE

Currently, `torch.randperm(10)` returns 

```
In [6]: torch.randperm(10)
Out[6]:

 2
 3
 7
 4
 9
 8
 5
 6
 1
 0
[torch.LongTensor of size 10]
```

This is clearly wrong and unexpected behavior. Needs to return numbers in range [1, 10]