[PATCH] tst: Provide test for ctime

[Florian Weimer]

* Lukasz Majewski:

>> The test wrappers do not set TZ, so you end up with whatever TZ points
>> to, or the system is configured with via /etc/localtime.  ctime is
>> specified to use local time, not UTC.
>
> I think that I got your point. Do you propose to use the same code as
> in ./time/tst-y2039.c test?

Yes, please use setenv or putenv.

Thanks,
Florian
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