RFR: 8341246: Test com/sun/tools/attach/PermissionTest.java fails access denied after JDK-8327114 [v2]

[SendaoYan]

On Tue, 1 Oct 2024 15:38:56 GMT, SendaoYan <syan at openjdk.org> wrote:

>> Hi all,
>> Test `com/sun/tools/attach/PermissionTest.java` fails access denied after [JDK-8327114](https://bugs.openjdk.org/browse/JDK-8327114). This testcase need the `readlink` permission of file `/proc/self/ns/mnt` after [JDK-8327114](https://bugs.openjdk.org/browse/JDK-8327114).
>> So this PR add `readlink` permission to make this test work normally.
>> Before this PR, test run failed, after this PR, test run success. Test fix only, no risk.
>
> SendaoYan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   merge two comments enclosed with /* ... */ on two lines

The comment has been changed according the latest review, can anyone review again.

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PR Comment: https://git.openjdk.org/jdk/pull/21269#issuecomment-2389005889