Add AT_MINSIGSTKSZ for android

[ur4t]

Add AT_MINSIGSTKSZ for android, which was not performed by #3637 .

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @JohnTitor (or someone else) some time within the next two weeks.

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[ur4t]

@tgross35 This PR (#3732) has been cherry-picked to main as part of #3699 with commit hash 5b9628e.

[tgross35]

Ah thanks! Try to cherry pick with -xe if you do others in the future, it's tough to figure out how things crosslink otherwise (some more here https://github.com/rust-lang/libc/blob/main/CONTRIBUTING.md#v10-roadmap).

[ur4t]

@tgross35 Thanks for the guidance, and praise the refined workflow! It is indeed much cleaner for both maintainers and contributors.