[jdk17u] RFR: 8274293: Build failure on macOS with Xcode 13.0 as vfork is deprecated

[Jie Fu]

On Tue, 12 Oct 2021 06:09:06 GMT, xpbob <duke at openjdk.java.net> wrote:

> I open the test action before pull request. but test not run.

I've no idea why it didn't test for your PR.

I think it's OK to go since it's a clean backport.
However, it would be better if you can test tier1 on Mac before integration.
Thanks.

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PR: https://git.openjdk.java.net/jdk17u/pull/183