[COMMITTED PATCH] Fix tst-audit10 build when -mavx512f is not supported.

[Florian Weimer]

On 03/08/2016 09:36 PM, Roland McGrath wrote:
> This unbroke my local build with the same compiler the bot uses, and
> so I expect it to unbreak the bot too.

Sorry, and thanks for correcting this.  I verified that it fixes things
for GCC 4.7 as well.

Florian