RFR: JDK-8319516 - Native library suffix impact on the library loading in AIX- Java Class Loader

[Suchismith Roy]

Allow support for both .a and .so files in AIX.
If .so file is not found, allow fallback to .a extension.
JBS Issue: [JDK-8319516](https://bugs.openjdk.org/browse/JDK-8319516)

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Commit messages:
 - Add support for AIX dynamic libraries in Class Loader

Changes: https://git.openjdk.org/jdk/pull/17945/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17945&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319516
  Stats: 81 lines in 1 file changed: 81 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17945.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17945/head:pull/17945

PR: https://git.openjdk.org/jdk/pull/17945