[rs6000] Add register save/restore routines for cross

[Alan Modra]

On Wed, May 22, 2013 at 09:40:22AM -0400, David Edelsohn wrote:
> I don't believe those functions should be provided by libgcc, at least
> not by shared libgcc.so, as explained by Alan.

David, I think t-savresfgpr satifies that requirement.

# These can't end up in shared libgcc
LIB2ADD_ST += \
...

-- 
Alan Modra
Australia Development Lab, IBM