Turn off gcc 12 compiler warning about lack of support for instrumenting std::atomic_thread_fence with thread sanitizer
Turn off gcc 12 compiler warning about lack of support for instrumenting
std::atomic_thread_fence with thread sanitizer

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa