libbpf-cargo: Allow renamed lint usage in skeleton

We have seen several lints get renamed or removed over time. Our
generated skeletons explicitly allow a couple of lints and these may be
affected by such changes as well. To make that less of an event,
silently allow the usage of renamed lints down there.

Signed-off-by: Daniel Müller <deso@posteo.net>

libbpf-cargo/src/gen/mod.rs

@@ -868,6 +868,7 @@ fn gen_skel_contents(raw_obj_name: &str, obj_file_path: &Path) -> Result<String>
 
         pub use self::imp::*;
 
+        #[allow(renamed_and_removed_lints)]
         #[allow(dead_code)]
         #[allow(non_snake_case)]
         #[allow(non_camel_case_types)]