order derivable traits lists

Ignoring :
 - **generated**.rs
 - python/tidy/servo_tidy_tests/rust_tidy.rs

components/style/gecko_string_cache/namespace.rs

@@ -18,7 +18,7 @@ macro_rules! ns {
 }
 
 /// A Gecko namespace is just a wrapped atom.
-#[derive(Debug, PartialEq, Eq, Clone, Default, Hash)]
+#[derive(Clone, Debug, Default, Eq, Hash, PartialEq)]
 pub struct Namespace(pub Atom);
 
 impl PrecomputedHash for Namespace {