RFR: 8355971: Build warnings after the changes for JDK-8354996

Wed Apr 30 17:38:23 UTC 2025

There were a few warnings related to illegal native access in HelloClasslist after adding some of the downcall infrastructure. Did a clean build and there were no warning associated with the 

Compiling up to 2 files for CLASSLIST_JAR
Creating support/classlist.jar

steps.

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Commit messages:
 - 8355971: Build warnings after the changes for JDK-8354996

Changes: https://git.openjdk.org/jdk/pull/24970/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24970&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355971
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24970.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24970/head:pull/24970

PR: https://git.openjdk.org/jdk/pull/24970