Fix strict-aliasing warnings from unwind-dw2-fde.c

[Jeff Law]

On 11/29/2012 03:24 PM, Roland McGrath wrote:
> Thanks.  I've replaced the branch with this version (in case it works):
>
> 	* sysdeps/powerpc/powerpc64/entry.h (TEXT_START): Define using a
> 	second, differently-typed declaration, rather than a cast.
This version works, if you could push it to master I'd appreciate it.

Your fix to tst-inet6_rth worked as well.

jeff