RFR: 8330008: [s390x] Test bit "in-memory" in case of DiagnoseSyncOnValueBasedClasses [v2]

[Amit Kumar]

> It's trivial update to use `testbit` method to test the bit "in-memory"

Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:

  updates comment in sharedRuntime_s390.cpp file

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18709/files
  - new: https://git.openjdk.org/jdk/pull/18709/files/127ea97d..454b08a6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18709&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18709&range=00-01

  Stats: 4 lines in 1 file changed: 0 ins; 2 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18709.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18709/head:pull/18709

PR: https://git.openjdk.org/jdk/pull/18709