add missing unsafe around extern

src/uu/hostid/src/hostid.rs

@@ -13,7 +13,7 @@ const USAGE: &str = help_usage!("hostid.md");
 const ABOUT: &str = help_about!("hostid.md");
 
 // currently rust libc interface doesn't include gethostid
-extern "C" {
+unsafe extern "C" {
     pub fn gethostid() -> c_long;
 }
 

src/uu/logname/src/logname.rs

@@ -9,7 +9,7 @@ use clap::Command;
 use std::ffi::CStr;
 use uucore::{error::UResult, format_usage, help_about, help_usage, show_error};
 
-extern "C" {
+unsafe extern "C" {
     // POSIX requires using getlogin (or equivalent code)
     pub fn getlogin() -> *const libc::c_char;
 }