Move /src/test to /tests

tests/ui/threads-sendsync/task-comm-chan-nil.rs

@@ -0,0 +1,13 @@
+// run-pass
+
+use std::sync::mpsc::channel;
+
+// rustboot can't transmit nils across channels because they don't have
+// any size, but rustc currently can because they do have size. Whether
+// or not this is desirable I don't know, but here's a regression test.
+pub fn main() {
+    let (tx, rx) = channel();
+    tx.send(()).unwrap();
+    let n: () = rx.recv().unwrap();
+    assert_eq!(n, ());
+}