[PATCH v2] timezone: Enhance tst-bz28707 diagnostics

[Florian Weimer]

* Adhemerval Zanella Netto:

>> +  errno = 0;
>>    tzset ();
>> +  if (errno != 0)
>> +    printf ("warning: tzset set errno to %d (%m)", errno);
>
> Shouldn't it call support_record_failure() in this case?

It's not a documented way for checking for tzset failures.  I don't want
to increase the number of test failures we see further. 8-)

Thanks,
Florian