Add missing line in test expectation

Author: cynecx

tests/expectations/tests/issue-511.rs

@@ -1,5 +1,7 @@
 /* automatically generated by rust-bindgen */
 
+#![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
+
 extern "C" {
     #[link_name = "\u{1}a"]
     pub static mut a: *mut ::std::os::raw::c_char;