Add support for generating lints when using the new driver

pkg/analyzer/lib/src/dart/analysis/status.dart

Index: pkg/analyzer/lib/src/dart/analysis/status.dart
diff --git a/pkg/analyzer/lib/src/dart/analysis/status.dart b/pkg/analyzer/lib/src/dart/analysis/status.dart
index 3e2d79c7d7879d0c4035302df29f94dc4c90d6c4..000c966818fa5f9ba19a1bdd4d35ab302d1a0aec 100644
--- a/pkg/analyzer/lib/src/dart/analysis/status.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/status.dart
@@ -70,6 +70,11 @@ class StatusSupport {
   AnalysisStatus _currentStatus = AnalysisStatus.IDLE;
 
   /**
+   * Return the last status sent to the [stream].
+   */
+  AnalysisStatus get currentStatus => _currentStatus;
+
+  /**
    * Return the stream that produces [AnalysisStatus] events.
    */
   Stream<AnalysisStatus> get stream => _statusController.stream;