RFR: 8327361: Update some comments after JDK-8139457 [v2]

[Aleksey Shipilev]

On Tue, 5 Mar 2024 11:41:20 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> A follow-up to [8139457: Relax alignment of array elements](https://bugs.openjdk.org/browse/JDK-8139457) ([PR](https://git.openjdk.org/jdk/pull/11044)), some comments need an update.
>
> Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:
> 
>   RISCV changes

Marked as reviewed by shade (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/18120#pullrequestreview-1930857425