ppc64le: getauxval call from IFUNC resolver

[Peter Bergner]

On 7/4/17 1:37 AM, Florian Weimer wrote:
> For the time being, we just disable --enable-bind-now, but I'd prefer a
> proper fix, perhaps the one suggested here:
> 
>   https://sourceware.org/ml/libc-alpha/2017-06/msg01383.html

I just committed this to GCC trunk today.  I still need to bootstrap
and regtest the backports to GCC 7 and GCC 6.

Peter