chore: bump libc to 0.2.155

[SteveLauC]

What does this PR do

libc 0.2.154 has been yanked, so we have to bump it to 0.2.155.

Checklist:

• I have read CONTRIBUTING.md
• I have written necessary tests and rustdoc comments
• A change log has been added if this PR modifies nix's API

[SteveLauC]

    Updating crates.io index
error: failed to select a version for the requirement `libc = "^0.2.154"`
candidate versions found which didn't match: 0.2.153, 0.2.152, 0.2.151, ...
location searched: crates.io index
required by package `nix v0.28.0 (/home/runner/work/nix/nix)`
perhaps a crate was updated and forgotten to be re-vendored?

libc 0.2.154 has been yanked due to this issue: rust-lang/libc#3677 (comment)

ref: https://crates.io/crates/libc/0.2.154

[SteveLauC]

Let's wait for rust-lang/libc#3682