[ppc] Include hwcap as ifunc argument

[Ryan S. Arnold]

On Mon, May 21, 2012 at 11:58 AM, Richard Henderson <rth@twiddle.net> wrote:
> Aside from the x86 port, there are only two targets that have ifunc
> support in glibc mainline: ppc and arm.  It would be awesomely handy
> if we switch these targets to mirror the sparc lead in passing along
> the dl_hwcap contents as an argument to the resolver, *and* to do it
> in the same release as adding getauxval.  There are some clever things
> we can do at static link time if we know that getauxval corresponds to
> the availability of the ifunc argument.

I'll test this right now.

Ryan