Add mirrors tests

test/codegen/lib/mirrors/method_mirror_source_line_ending_cr.dart

Index: test/codegen/lib/mirrors/method_mirror_source_line_ending_cr.dart
diff --git a/test/codegen/lib/mirrors/method_mirror_source_line_ending_cr.dart b/test/codegen/lib/mirrors/method_mirror_source_line_ending_cr.dart
new file mode 100755
index 0000000000000000000000000000000000000000..45533d47348666dc277b42e6845aeb29615f0b0f
--- /dev/null
+++ b/test/codegen/lib/mirrors/method_mirror_source_line_ending_cr.dart
@@ -0,0 +1 @@
+// Copyright (c) 2014, 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.
// Note: This test relies on CR line endings in the source file.
library line_endings.cr;
oneLineCR(x) => x;
multiLineCR(y) {
  return y + 1;
}
b
(){
}