Fix implementation of clone and exec. Now the init process can load and execute the pci driver

init/src/main.rs

@@ -1,4 +1,4 @@
-use std::{env, thread};
+use std::env;
 use std::fs::File;
 use std::io::{BufRead, BufReader};
 use std::process::Command;
@@ -47,8 +47,4 @@ pub fn main() {
             }
         }
     }
-
-    loop {
-        thread::yield_now();
-    }
 }