RFR: 8325049: stubGenerator_ppc.cpp should use alignas

[Martin Doerr]

On Wed, 31 Jan 2024 13:11:03 GMT, Julian Waters <jwaters at openjdk.org> wrote:

> Please review a trivial change to make stubGenerator_ppc.cpp use the well defined alignas instead of the aligned attribute. This was the only site I could find that does not use ATTRIBUTE_ALIGNED and instead independently defines the aligned attribute on its own, so I swapped it to use alignas instead

LGTM.

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Marked as reviewed by mdoerr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17652#pullrequestreview-1861352261