Add the vm internal dart tests into the test suite.

runtime/tests/vm/src/test1.dart

Index: runtime/tests/vm/src/test1.dart
===================================================================
--- runtime/tests/vm/src/test1.dart	(revision 5107)
+++ runtime/tests/vm/src/test1.dart	(working copy)
@@ -1,22 +0,0 @@
-// Copyright (c) 2012, 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.
-//
-// VMOptions=--import_map=GOOGLE,. --import_map=SRC,mysrc --import_map=DART,.
-//
-// Dart test program for checking implementation of string
-// interapolation feature in import statements.
-
-#library('test1.dart');
-
-#import('${GOOGLE}/$SRC/test2.dart');
-#import('$SRC/test3.dart');
-
-int test1() {
-  return 1;
-}
-
-main() {
-  var result = test1() + test2() + test3();
-  Expect.equals(6, result);
-}