Include hwcap as ifunc argument

[Ryan S. Arnold]

On Fri, May 25, 2012 at 12:44 PM, Richard Henderson <rth@twiddle.net> wrote:
> Committed as follows, after re-testing on arm, ppc[32/64].

Hi Richard,

Peter Bergner reminded me today that on PowerPC the IFUNC resolver
will most likely/often use the value in AT_PLATFORM rather than
AT_HWCAP to determine which optimized function to use.  I suppose this
would diminish the necessity of passing the hwcap to the ifunc
resolver.

Ryan