Newer hwcap failures

[Florian Weimer]

* Szabolcs Nagy via Libc-alpha:

> hm ok i use --host=i686-linux-gnu but not build
> may be i should add --build too.

I can reproduce the issue with

  ../git/configure --prefix=/usr CC="gcc -m32" CXX="g++ -m32" \
    --host=i686-linux-gnu

on a multilib x86-64 system.  This means that I now have something to
investigate.

Thanks,
Florian
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