RFR: 8353709: Debug symbols bundle should contain full debug files when building --with-external-symbols-in-bundles=public

[Christoph Langer]

Currently, when building with `--with-external-symbols-in-bundles=public`, the debug symbols bundle contains the stripped pdb files. It should better have the full pdb files since stripped pdbs are in the runtime image already.

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Commit messages:
 - JDK-8353709

Changes: https://git.openjdk.org/jdk/pull/24440/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24440&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353709
  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24440.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24440/head:pull/24440

PR: https://git.openjdk.org/jdk/pull/24440