PATCH: Support parallel localedata install

[Ulrich Drepper]

"H . J . Lu" <hjl@lucon.org> writes:

> This patch cuts the time for
> 
> # make PARALLELMFLAGS="-j4" install-locales
> 
> from 9m7.016s to 5m24.817s on a dual P/III 933 MHz.

I couldn't think about much which would interest me less but since
you've done the work...  Thanks,

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