[tz] [PROPOSED] Fix Y2242 bug in tzdb tarball generation

[Clive D.W. Feather]

Paul Eggert via tz said:
> +    of " ".  The two formats are planned to diverge more significantly
> +    for tzdb releases after 2242-03-16 12:56:31 UTC,

Hey, that'll be my 281st birthday!

-- 
Clive D.W. Feather          | If you lie to the compiler,
Email: clive at davros.org     | it will get its revenge.
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