RFR: 8341644: Compile error in cgroup coding when using toolchain clang

[Matthias Baesken]

When building on Linux but with toolchain-type clang , I run into a couple of errors because of missing override .

We use this clang on the build machine
clang --version
clang version 15.0.7
Target: x86_64-suse-linux

The issue seems to be similar to JDK-8338236 .

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Commit messages:
 - JDK-8341644

Changes: https://git.openjdk.org/jdk/pull/21391/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21391&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341644
  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/21391.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21391/head:pull/21391

PR: https://git.openjdk.org/jdk/pull/21391