RFR: 8347408: Create an internal method handle adapter for system calls with errno [v3]

[Per Minborg]

On Wed, 7 May 2025 03:05:31 GMT, Shaojin Wen <swen at openjdk.org> wrote:

>> enhanced 'switch' is just syntax sugar and does not affect startup speed
>
> I looked at the generated bytecode through javap and confirmed that the enhanced switch is just syntactic sugar and no additional classes are generated.

Thanks for clarifying this @wenshao ! I will go ahead and make the changes proposed by you here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25043#discussion_r2077073780