[jdk21u] RFR: 8311955: c++filt is now ibm-llvm-cxxfilt when using xlc17 / clang on AIX

[Matthias Baesken]

8311955: c++filt is now ibm-llvm-cxxfilt when using xlc17 / clang on AIX

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Commit messages:
 - Backport 0328886450a4978f1edbe06a59d2ab8f733d19a9

Changes: https://git.openjdk.org/jdk21u/pull/34/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=34&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8311955
  Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u/pull/34.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/34/head:pull/34

PR: https://git.openjdk.org/jdk21u/pull/34