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

[Andreas Steiner]

When using xlc17 to build on AIX , the mentioned tool is /opt/IBM/openxlC/17.1.1/tools/ibm-llvm-cxxfilt instead of c++filt to check that global operators new and delete are not present in hotspot objects.

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Commit messages:
 - JDK-8311955

Changes: https://git.openjdk.org/jdk/pull/14972/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14972&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/jdk/pull/14972.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14972/head:pull/14972

PR: https://git.openjdk.org/jdk/pull/14972