RFR: 8252584: HotSpot Style Guide should permit alignas [v2]

[Kim Barrett]

On Wed, 30 Nov 2022 07:26:46 GMT, Julian Waters <jwaters at openjdk.org> wrote:

>> Add alignas to the permitted features set with some restrictions. (Thanks @kimbarrett for the help)
>
> Julian Waters 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 two additional commits since the last revision:
> 
>  - Merge branch 'openjdk:master' into alignas
>  - HotSpot Style Guide changes

This change should not have been integrated yet.  Changes to the Style Guide have an approval process that is described in that document, including a 2 week voting period and final approval by the HotSpot lead.

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PR: https://git.openjdk.org/jdk/pull/11404