Add baseline touch comment to objectMonitor.cpp

[macarte]

No description provided.

[macarte]

Note that not listed as an error in the GHA results is an intermittent failure in Starvation.java; this occurs more frequently on machines with > 64 processors

[macarte]

results

Here are all 4 errored tests across the 2 failing windows-aarch64 groups on PR #50:

  ┌──────────────────────┬───────────────────────────────────────────────────────────────────────────────┬─────────────────────┐
  │ Group                │ Test                                                                          │ Error               │
  ├──────────────────────┼───────────────────────────────────────────────────────────────────────────────┼─────────────────────┤
  │ jdk/tier1 part 1     │ java/lang/Thread/virtual/stress/PingPong.java#ltq                             │ Timed out 480s      │
  ├──────────────────────┼───────────────────────────────────────────────────────────────────────────────┼─────────────────────┤
  │ jdk/tier1 part 1     │ java/lang/Thread/virtual/stress/PingPong.java#sq                              │ Timed out 480s      │
  ├──────────────────────┼───────────────────────────────────────────────────────────────────────────────┼─────────────────────┤
  │ jdk/tier1 part 1     │ java/lang/Thread/virtual/stress/Skynet.java#default                           │ JVM timed out 6400s │
  ├──────────────────────┼───────────────────────────────────────────────────────────────────────────────┼─────────────────────┤
  │ jdk/tier1 part 2     │ java/util/concurrent/BlockingQueue/SingleProducerMultipleConsumerLoops.java   │ Timed out 480s      │
  └──────────────────────┴───────────────────────────────────────────────────────────────────────────────┴─────────────────────┘

  Same 4 tests as PR #48. The hs/tier1 serviceability JVMTI stress test (GetStackTraceNotSuspendedStressTest) that failed on PR #48
  passed this time — so that one was likely flaky. The core failures remain the virtual thread and j.u.c concurrency tests that need
  the Dekker fences from PRs 3 and 5.