[jdk21u] RFR: 8316648: jrt-fs.jar classes not reproducible between standard and bootcycle builds

[Andrew Leonard]

Backport of https://bugs.openjdk.org/browse/JDK-8316648 to enable reproducible jrt-fs class compilation using the interim compiler.

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Commit messages:
 - Backport 0f0c5b2d71e6dec442a5105ba305043cb59b99fc

Changes: https://git.openjdk.org/jdk21u/pull/300/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=300&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316648
  Stats: 4 lines in 1 file changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u/pull/300.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/300/head:pull/300

PR: https://git.openjdk.org/jdk21u/pull/300