Move frog/tests/{leg,leg_only,frog_native} to tests/compiler/.

frog/tests/leg_only/foo7_test.dart

Index: frog/tests/leg_only/foo7_test.dart
===================================================================
--- frog/tests/leg_only/foo7_test.dart	(revision 8644)
+++ frog/tests/leg_only/foo7_test.dart	(working copy)
@@ -1,11 +0,0 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-void main() {
-  print(foo());
-}
-
-void foo() {
-  return 3 + 4;
-}