order derivable traits lists

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

components/script_layout_interface/reporter.rs

@@ -11,7 +11,7 @@ use servo_url::ServoUrl;
 use std::sync::{Mutex, Arc};
 use style::error_reporting::{ParseErrorReporter, ContextualParseError};
 
-#[derive(HeapSizeOf, Clone)]
+#[derive(Clone, HeapSizeOf)]
 pub struct CSSErrorReporter {
     pub pipelineid: PipelineId,
     // Arc+Mutex combo is necessary to make this struct Sync,