RFR: 8274293: Build failure on macOS with Xcode 13.0 as vfork is deprecated [v2]

[Roger Riggs]

On Sat, 25 Sep 2021 01:48:29 GMT, xpbob <github.com+7837910+xpbob at openjdk.org> wrote:

>> remove vfork() on Darwin
>
> xpbob has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Drop drop "Solaris" from the comment

Looks good, vfork is not/was not being used on Mac OS.

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Marked as reviewed by rriggs (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5686