[test] Prevent minification of dart2js type names

Allows test to succeed when calling .toString on a type and expecting
a specific string.

Change-Id: Icf50d324c59e7432a6a9af3d722db3e9e3d8545e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/343684
Reviewed-by: Nate Biggs <[email protected]>
Reviewed-by: Nate Bosch <[email protected]>
Commit-Queue: Nicholas Shahan <[email protected]>

Author: nshahan

tests/language/unsorted/cyclic_type2_test.dart

@@ -2,6 +2,9 @@
 // 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.
 
+// Prevent obfuscation:
+// dart2jsOptions=--no-minify
+
 // Tests self referencing types.
 
 import "package:expect/expect.dart";