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

frog/tests/leg_only/equals_test.dart

-// 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() {
-  var x = 3;
-  if (x == x) {
-    print('good');
-  } else {
-    throw "x != x with x == 3";
-  }
-  var y = x;
-  if (true) { y = 10; }
-  if (x == y) throw "3 == 10";
-  if (y == true) throw "10 == true";
-  if (y == "str") throw "3 == 'str'";
-  if (true == 'str') throw "true == 'str'";
-  if (true) y = false;
-  if (y == false) {
-    print('good');
-  } else {
-    throw "false != false";
-  }
-}