Add run-pass test for dyn Receiver

tests/ui/self/arbitrary-self-types-dyn-receiver.rs

@@ -0,0 +1,21 @@
+//@ run-pass
+#![feature(arbitrary_self_types)]
+
+use std::ops::Receiver;
+
+trait Trait {
+    fn foo(self: &dyn Receiver<Target=Self>);
+}
+
+struct Thing;
+impl Trait for Thing {
+    fn foo(self: &dyn Receiver<Target=Self>) {
+        println!("huh???");
+    }
+}
+
+fn main() {
+    let x = Box::new(Thing);
+    let y: &dyn Receiver<Target=Thing> = &x;
+    y.foo();
+}