Fixed path initialization in codegen

src/codegen/codegen.rs

@@ -18,7 +18,7 @@ fn main() {
             os::set_exit_status(1); 
         },
         3 => {
-            let output_dir = GenericPath::init(args[2].clone());
+            let output_dir = GenericPath::new(args[2].clone());
             // TODO: maybe not 0777?
             mkdir_recursive(&output_dir, 0b111_111_111);