[jdk17] RFR: 8269486: CallerAccessTest fails for non server variant

[Christoph Göttschkes]

Hi,

please review this small fix. The test case uses a custom launcher and before launching the JVM, it adds the "lib" and "lib/server" directories to the environment variable which controls the native library search path. For non server variants, the second directory is not called "lib/server", but "lib/client", for instance.

I changed the test case to use the utility methods in `Platform` to get the correct paths, dependent on the VM variant.

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Commit messages:
 - 8269486: CallerAccessTest fails for non server variant

Changes: https://git.openjdk.java.net/jdk17/pull/159/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=159&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269486
  Stats: 6 lines in 1 file changed: 0 ins; 3 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/159.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/159/head:pull/159

PR: https://git.openjdk.java.net/jdk17/pull/159