RFR: 8319571: Update jni/nullCaller/NullCallerTest.java to accept flags or mark as flagless [v2]

[Mandy Chung]

On Tue, 21 Nov 2023 17:30:20 GMT, Tim Prinzing <tprinzing at openjdk.org> wrote:

>> Marked as flagless.
>
> Tim Prinzing has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:
> 
>  - use ProcessTools helper class to run test.
>  - Merge branch 'master' into JDK-8319571
>  - Merge branch 'master' into JDK-8319571
>  - 8319571: Update jni/nullCaller/NullCallerTest.java to accept flags or mark as flagless
>    
>    Marked as flagless.

It'd help if the PR description reflects what this change is.  It's no longer made VM flagless.

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Marked as reviewed by mchung (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/16711#pullrequestreview-1751302106