Add (an as yet unused) task

pkg/analyzer/test/test_all.dart

Index: pkg/analyzer/test/test_all.dart
diff --git a/pkg/analyzer/test/test_all.dart b/pkg/analyzer/test/test_all.dart
index b1fceafe7258f1e7da7244da9114648ec013884a..5aa9922ed6bd6a7b197d6e6e3e3fe1026e1941ab 100644
--- a/pkg/analyzer/test/test_all.dart
+++ b/pkg/analyzer/test/test_all.dart
@@ -13,6 +13,7 @@ import 'generated/test_all.dart' as generated;
 import 'options_test.dart' as options;
 import 'parse_compilation_unit_test.dart' as parse_compilation_unit;
 import 'source/test_all.dart' as source;
+import 'task/test_all.dart' as task;
 
 
 /// Utility for manually running all tests.
@@ -26,5 +27,6 @@ main() {
     options.main();
     parse_compilation_unit.main();
     source.main();
+    task.main();
   });
-}
+}