RFR: JDK-8296149: Start of release updates for JDK 21 [v3]

[Andrey Turbanov]

On Sat, 3 Dec 2022 23:10:48 GMT, Joe Darcy <darcy at openjdk.org> wrote:

>> Usual start-of-release updates. Symbol updates in initial version reflect JDK 20 build 21.
>
> Joe Darcy 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 16 additional commits since the last revision:
> 
>  - Merge branch 'master' into JDK-8296149
>  - Merge branch 'master' into JDK-8296149
>  - Update symbol information for JDK 20 build 26.
>  - Merge branch 'master' into JDK-8296149
>  - Merge branch 'master' into JDK-8296149
>  - Fix failed HotSpot regression tests.
>  - Merge branch 'master' into JDK-8296149
>  - Update symbol information to JDK 20 build 24.
>  - Merge branch 'master' into JDK-8296149
>  - Merge branch 'master' into JDK-8296149
>  - ... and 6 more: https://git.openjdk.org/jdk/compare/c3a218e2...515002c7

test/langtools/tools/javac/versions/Versions.java line 91:

> 89:         EIGHTEEN(false,  "62.0", "18", Versions::checksrc18),
> 90:         NINETEEN(false,  "63.0", "19", Versions::checksrc19),
> 91:         TWENTY(false,  "64.0", "20", Versions::checksrc20),

nit:
Suggestion:

        TWENTY(false, "64.0", "20", Versions::checksrc20),

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PR: https://git.openjdk.org/jdk/pull/10924