Bump libc from 0.2.171 to 0.2.172 (#667)

Bumps [libc](https://github.com/rust-lang/libc) from 0.2.171 to 0.2.172.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Changelog](https://github.com/rust-lang/libc/blob/0.2.172/CHANGELOG.md)
- [Commits](rust-lang/libc@0.2.171...0.2.172)

---
updated-dependencies:
- dependency-name: libc
  dependency-version: 0.2.172
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]