Patch for /linux-fallocate.c

```
Allow build on both Debian and RHEL - unistd_64.h is debian specific. unistd.h 
has a ifdef that selects the right distribution specific file.
```

Original issue reported on code.google.com by `david.t....@gmail.com` on 31 May 2013 at 2:44

Attachments:
- [linux-fallocate.c.patch](https://storage.googleapis.com/google-code-attachments/linux-ftools/issue-5/comment-0/linux-fallocate.c.patch)
