RFR: JDK-8317799 : AIX PPC64: FFI symbol lookup doesn't find symbols

[suchismith1993]

1. Adding required compiler flags.
2. Adding required symbols.

JBS-ISSUE : [JDK-8317799](https://bugs.openjdk.org/browse/JDK-8317799)

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Commit messages:
 - Update symbols-aix-foreign
 - Symbol Resolution fix for Panama changes.

Changes: https://git.openjdk.org/jdk/pull/16414/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16414&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8317799
  Stats: 441 lines in 2 files changed: 441 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/16414.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16414/head:pull/16414

PR: https://git.openjdk.org/jdk/pull/16414