A batch of trivial fixes to ProblemList tests: [JDK-8298888](https://bugs.openjdk.org/browse/JDK-8298888) ProblemList gc/g1/TestVerifyGCType.java on linux and macosx [JDK-8298889](https://bugs.openjdk.org/browse/JDK-8298889) ProblemList runtime/StackGuardPages/TestStackGuardPages.java on linux [JDK-8298891](https://bugs.openjdk.org/browse/JDK-8298891) ProblemList vmTestbase/nsk/monitoring/MemoryPoolMBean/isCollectionUsageThresholdExceeded/isexceeded002/TestDescription.java with ZGC [JDK-8298892](https://bugs.openjdk.org/browse/JDK-8298892) ProblemList vmTestbase/nsk/sysdict/vm/stress/chain/chain008/chain008.java with ZGC
------------- Commit messages: - 8298892: ProblemList vmTestbase/nsk/sysdict/vm/stress/chain/chain008/chain008.java with ZGC - 8298891: ProblemList vmTestbase/nsk/monitoring/MemoryPoolMBean/isCollectionUsageThresholdExceeded/isexceeded002/TestDescription.java with ZGC - 8298889: ProblemList runtime/StackGuardPages/TestStackGuardPages.java on linux - 8298888: ProblemList gc/g1/TestVerifyGCType.java on linux and macosx Changes: https://git.openjdk.org/jdk20/pull/42/files Webrev: https://webrevs.openjdk.org/?repo=jdk20&pr=42&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8298888 Stats: 4 lines in 2 files changed: 4 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk20/pull/42.diff Fetch: git fetch https://git.openjdk.org/jdk20 pull/42/head:pull/42 PR: https://git.openjdk.org/jdk20/pull/42
