Fix logic for cors cache match

The current logic for a cors cache match does not consider "credentials
is false and request's credentials mode is not "include" or credentials
is true."

components/net_traits/request.rs

@@ -33,7 +33,7 @@ pub enum Destination {
 }
 
 /// A request [origin](https://fetch.spec.whatwg.org/#concept-request-origin)
-#[derive(Clone, PartialEq)]
+#[derive(Clone, PartialEq, Debug)]
 pub enum Origin {
     Client,
     Origin(UrlOrigin)