RFR: 8298068: ProblemList tests failing due to JDK-8297235

[Daniel D. Daugherty]

Batch of ProblemListings to reduce the noise in the JDK20 CI:

[JDK-8298068](https://bugs.openjdk.org/browse/JDK-8298068) ProblemList tests failing due to JDK-8297235
[JDK-8298070](https://bugs.openjdk.org/browse/JDK-8298070) ProblemList jdk/internal/vm/Continuation/Fuzz.java#default with ZGC on X64
[JDK-8298071](https://bugs.openjdk.org/browse/JDK-8298071) ProblemList tests failing due to JDK-8298059
[JDK-8298072](https://bugs.openjdk.org/browse/JDK-8298072) ProblemList compiler/c1/TestPrintC1Statistics.java in Xcomp mode on linux-aarch64

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Commit messages:
 - Use the correct platform string for compiler/c1/TestPrintC1Statistics.java
 - 8298072: ProblemList compiler/c1/TestPrintC1Statistics.java in Xcomp mode on linux-aarch64
 - 8298071: ProblemList tests failing due to JDK-8298059
 - 8298070: ProblemList jdk/internal/vm/Continuation/Fuzz.java#default with ZGC on X64
 - 8298068: ProblemList tests failing due to JDK-8297235

Changes: https://git.openjdk.org/jdk/pull/11501/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11501&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298068
  Stats: 73 lines in 3 files changed: 72 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/11501.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11501/head:pull/11501

PR: https://git.openjdk.org/jdk/pull/11501