Update Rust crate libc to 0.2.178 (#138)

Co-authored-by: oxide-renovate[bot] <146848827+oxide-renovate[bot]@users.noreply.github.com>

Author: oxide-renovate[bot]

Cargo.lock

@@ -16,7 +16,7 @@ clap = { version = "4.5.53", features = ["derive", "unstable-styles"] }
 devinfo = { git = "https://github.com/oxidecomputer/devinfo-sys", branch = "main" }
 dlpi = { git = "https://github.com/oxidecomputer/dlpi-sys", branch = "main" }
 indicatif = "0.18.3"
-libc = "0.2.177"
+libc = "0.2.178"
 libloading = "0.8.9"
 p9ds = { git = "https://github.com/oxidecomputer/p9fs", branch = "main" }
 p9kp = { git = "https://github.com/oxidecomputer/p9fs", branch = "main" }