RFR: 7903539: Please make jtreg build date reproducible

Sun Sep 3 20:08:57 UTC 2023

On Fri, 1 Sep 2023 15:25:45 GMT, Christian Stein <cstein at openjdk.org> wrote:

> Question: what about additionally using `jar --date ...` when creating the archive?
I could not add it because  the minimal version for building jtreg is 11, which does not have `--date` yet  (it was added in 17).

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PR Comment: https://git.openjdk.org/jtreg/pull/170#issuecomment-1704390207