Make openjdk build Zip Archive generation "reproducible"

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      Currently the openjdk ZipArchive.gmk uses "zip" to create archives, this is unfortunately non-deterministic due to variable current timestamps and file ordering. zip also does not support the SOURCE_DATE_EPOCH environment variable.

      This enhancement will contribute a new openjdk build tool (GenerateZip), which will use ZipOutputStream and ensure ordered file content and timestamping. This will replace the final generation of the zip in ZipArchive.gmk.

            Assignee:
            Andrew Leonard
            Reporter:
            Andrew Leonard
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