RFR: 8276615: Update CR number of some tests in ProblemList-zgc.txt

[David Holmes]

On Thu, 4 Nov 2021 00:46:49 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

> Following tests are referred to [JDK-8220624](https://bugs.openjdk.java.net/browse/JDK-8220624), however it has been closed due to all subtasks were resolved.
> 
> * resourcehogs/serviceability/sa/TestHeapDumpForLargeArray.java
> * serviceability/sa/CDSJMapClstats.java
> * serviceability/sa/ClhsdbJhisto.java
> 
> We will work these problems in [JDK-8276539](https://bugs.openjdk.java.net/browse/JDK-8276539), so we need to update CR number of them.

Looks good and trivial.

Thanks,
David

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6244