[jdk20] RFR: 8298225: [AIX] Disable PPC64LE continuations on AIX [v2]

[Martin Doerr]

On Fri, 9 Dec 2022 15:59:58 GMT, Tyler Steele <tsteele at openjdk.org> wrote:

>> This small change adds an import to ppc.ad to allow it to find Contiuations::enabled, and sets VMContinuations to false on AIX.
>> 
>> Thanks to @TheRealMDoerr for suggestions to a previous version of this PR.
>
> Tyler Steele has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Removes indenting before #include macro in ppc.ad

Marked as reviewed by mdoerr (Reviewer).

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PR: https://git.openjdk.org/jdk20/pull/4