[PATCH] Retrive 64bit timestamp from curl_easy_getinfo on _TIME_BITS=64 environment

[Frank Ch. Eigler]

Hi -

> I'm not sure the fix is the correct way, but
> since -D_TIME_BITS=64 mandates -D_FILE_OFFSET_BITS=64 in glibc,
> this does work on glibc environment.

Thanks, this looked fine in a quick test, so merged.

- FChE