Fix CQS signal readability-named-parameter in xplat/yoga/tests/util (#1875)

Summary: Pull Request resolved: #1875

Differential Revision: D92381721

fbshipit-source-id: 6e87090e73e744101eeea30851d1dee36dc0fc34

Author: generatedunixname1587093422349604

tests/util/TestUtil.h

@@ -21,7 +21,7 @@ struct TestUtil {
 };
 
 struct ScopedEventSubscription {
-  explicit ScopedEventSubscription(std::function<Event::Subscriber>&&);
+  explicit ScopedEventSubscription(std::function<Event::Subscriber>&& s);
   ~ScopedEventSubscription();
 };