order derivable traits lists

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

components/style/gecko/pseudo_element_definition.mako.rs

@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /// Gecko's pseudo-element definition.
-#[derive(Clone, Debug, PartialEq, Eq, Hash)]
+#[derive(Clone, Debug, Eq, Hash, PartialEq)]
 pub enum PseudoElement {
     % for pseudo in PSEUDOS:
         /// ${pseudo.value}