android: add readahead

[vauradkar]

No description provided.

[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) soon.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

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[JohnTitor]

Could you edit the corresponding semver file?

[vauradkar]

Could you edit the corresponding semver file?

Done

[JohnTitor]

You have to edit the related files under https://github.com/rust-lang/libc/tree/main/libc-test/semver. Once it's done please squash commits into one.

[bors]

☔ The latest upstream changes (presumably #3360) made this pull request unmergeable. Please resolve the merge conflicts.

[JohnTitor]

Friendly-ping @vauradkar, could you check the above comment? Thanks!

[JohnTitor]

Closing as inactive, feel free to resubmit if you're still interested in this change. Thank you for the PR anyway!