[PATCH] Protect _dl_profile_fixup data-dependency order [BZ #23690]

[Florian Weimer]

* Tulio Magno Quites Machado Filho:

>> I assume it's burning CPU all the time?  Then you should put it into
>> nptl/ because those tests run serialized.  If you think it should run
>> longer than five second, we perhaps should make it an xtest.
>
> Yes, it does burn CPU for ~30s on a POWER8.

30 second wall clock time?  That's a bit borderline, but not excessive
considering the overall nptl testing time.  But maybe it should still be
an xtest.

Thanks,
Florian