chore: display some clippy lints in generated code

We can not do anything about the gl_generator at this point, so just
continue disabling things clippy don't really like.

glutin_egl_sys/src/lib.rs

@@ -11,6 +11,7 @@
 #![allow(clippy::missing_safety_doc)]
 #![allow(clippy::manual_non_exhaustive)]
 #![allow(clippy::unnecessary_cast)]
+#![allow(unknown_lints, clippy::missing_transmute_annotations)]
 
 pub mod egl;
 

glutin_gles2_sys/src/lib.rs

@@ -3,6 +3,7 @@
 #![allow(clippy::missing_safety_doc)]
 #![allow(clippy::manual_non_exhaustive)]
 #![allow(clippy::unnecessary_cast)]
+#![allow(unknown_lints, clippy::missing_transmute_annotations)]
 
 pub mod gles {
     include!(concat!(env!("OUT_DIR"), "/gles2_bindings.rs"));

glutin_glx_sys/src/lib.rs

@@ -10,6 +10,7 @@
 #![allow(clippy::unused_unit)]
 #![allow(clippy::redundant_static_lifetimes)]
 #![allow(clippy::unnecessary_cast)]
+#![allow(unknown_lints, clippy::missing_transmute_annotations)]
 
 pub use self::glx::types::GLXContext;
 pub use x11_dl::xlib::*;

glutin_wgl_sys/src/lib.rs

@@ -3,6 +3,8 @@
 #![allow(clippy::missing_safety_doc)]
 #![allow(clippy::manual_non_exhaustive)]
 #![allow(clippy::unnecessary_cast)]
+#![allow(unused_imports)]
+#![allow(unknown_lints, clippy::missing_transmute_annotations)]
 
 /// WGL bindings
 pub mod wgl {