Fix dill_loader_test that relied on list_literal_test.

tests/compiler/dart2js/dill_loader_test.dart

Index: tests/compiler/dart2js/dill_loader_test.dart
diff --git a/tests/compiler/dart2js/dill_loader_test.dart b/tests/compiler/dart2js/dill_loader_test.dart
index 85e3654fc42ad8dbdbb24b9849765409902727b7..192a7d4f74e3cdbc441e4d7758012a0258c8b3c4 100644
--- a/tests/compiler/dart2js/dill_loader_test.dart
+++ b/tests/compiler/dart2js/dill_loader_test.dart
@@ -36,7 +36,7 @@ class TestScriptLoader implements ScriptLoader {
 /// than just string source files.
 main() {
   asyncTest(() async {
-    String filename = 'tests/corelib/list_literal_test.dart';
+    String filename = 'tests/corelib_2/list_literal_test.dart';
     Uri uri = Uri.base.resolve(filename);
     DiagnosticCollector diagnostics = new DiagnosticCollector();
     OutputCollector output = new OutputCollector();