[jdk17u-dev] RFR: 8283315: jrt-fs.jar not always deterministically built

[Stewart X Addison]

Backport the patch to allow reproducibility of the generation of jrt-fs.jar.
Verified in my build environment where I've built it twice and been able to get the files to come out identical.

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Commit messages:
 - Backport 85cc6f1440aa7e073cab894cb9a72d9eed4e8369

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/411/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=411&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8283315
  Stats: 6 lines in 1 file changed: 3 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/411.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/411/head:pull/411

PR: https://git.openjdk.java.net/jdk17u-dev/pull/411