Fix some tests and exclude others from CRLF rewriting.

tests/compiler/dart2js_extra/string_interpolation_test.dart

Index: tests/compiler/dart2js_extra/string_interpolation_test.dart
diff --git a/tests/compiler/dart2js_extra/string_interpolation_test.dart b/tests/compiler/dart2js_extra/string_interpolation_test.dart
index 7552214ab214c4ab3edab7137215775bb54d2f83..b8350e10cd08baf11da11aa97658169714b41c06 100644
--- a/tests/compiler/dart2js_extra/string_interpolation_test.dart
+++ b/tests/compiler/dart2js_extra/string_interpolation_test.dart
@@ -2,6 +2,8 @@
 // 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 LF line endings in the source file.
+
 import "package:expect/expect.dart";
 
 // Test that String interpolation works in the code generated by the leg