send priority instrumentation message on startup with version info

pkg/analysis_server/lib/src/analysis_server.dart

Index: pkg/analysis_server/lib/src/analysis_server.dart
diff --git a/pkg/analysis_server/lib/src/analysis_server.dart b/pkg/analysis_server/lib/src/analysis_server.dart
index a8a491bdfa5eb7f72d0314e5787d22a499377977..af73878ac8680193c4d80847d3f17149725c9996 100644
--- a/pkg/analysis_server/lib/src/analysis_server.dart
+++ b/pkg/analysis_server/lib/src/analysis_server.dart
@@ -62,6 +62,10 @@ class AnalysisDoneReason {
  * [CommunicationChannel] for analysis requests and process them.
  */
 class AnalysisServer {
+
+  // Replaced during build with AnalysisServer version
+  static final String VERSION = '0.0.1';
+
   /**
    * The channel from which requests are received and to which responses should
    * be sent.