Change newlib daddr_t to 64 bits

[Chris Johns]

On 28/10/20 7:14 am, Joel Sherrill wrote:
> Chris asked about a patch to newlib to make daddr_t 64-bits since it represents
> a disk address.  I haven't tested this because gcc master isn't building for me. 
> 
> If this works Chris, I will post it to newlib.

The change works with the RTEMS 6 tools I have. I patched this file manually and
the effected code built.

Can the change be added to the RBS for the RTEMS 6 tools?

Thanks
Chris