RFR: 8276743: Make openjdk build Zip Archive generation "reproducible" [v3]

[Andrew Leonard]

> This PR adds a new openjdk build tool GenerateZip, which generates a final "zip" file from an input folder, and creates it in a deterministic way, ensuring ordering and timestamps are set as specified.
> 
> Using this tool in ZipArchive.gmk will ensure src.zip is then created deterministically.
> 
> Signed-off-by: Andrew Leonard <anleonar at redhat.com>

Andrew Leonard has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  8276743: Make openjdk build Zip Archive generation "reproducible"
  
  Signed-off-by: Andrew Leonard <anleonar at redhat.com>

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6311/files
  - new: https://git.openjdk.java.net/jdk/pull/6311/files/f8a816af..44036af7

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6311&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6311&range=01-02

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6311.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6311/head:pull/6311

PR: https://git.openjdk.java.net/jdk/pull/6311