Roll Observatory packages and add a roll script

packages/analyzer/lib/instrumentation/instrumentation.dart

Index: packages/analyzer/lib/instrumentation/instrumentation.dart
diff --git a/analyzer/lib/instrumentation/instrumentation.dart b/packages/analyzer/lib/instrumentation/instrumentation.dart
similarity index 96%
rename from analyzer/lib/instrumentation/instrumentation.dart
rename to packages/analyzer/lib/instrumentation/instrumentation.dart
index ee3c74729ea2474cef10fafe2f742dc9eea56fb0..18772dead39c27916fae1781d78bec6c61f2ca1c 100644
--- a/analyzer/lib/instrumentation/instrumentation.dart
+++ b/packages/analyzer/lib/instrumentation/instrumentation.dart
@@ -150,12 +150,21 @@ class InstrumentationService {
    * entry has the given [level] and [message], and was created at the given
    * [time].
    */
-  void logLogEntry(String level, DateTime time, String message) {
+  void logLogEntry(String level, DateTime time, String message,
+      Object exception, StackTrace stackTrace) {
     if (_instrumentationServer != null) {
       String timeStamp =
           time == null ? 'null' : time.millisecondsSinceEpoch.toString();
-      _instrumentationServer
-          .log(_join([TAG_LOG_ENTRY, level, timeStamp, message]));
+      String exceptionText = exception.toString();
+      String stackTraceText = stackTrace.toString();
+      _instrumentationServer.log(_join([
+        TAG_LOG_ENTRY,
+        level,
+        timeStamp,
+        message,
+        exceptionText,
+        stackTraceText
+      ]));
     }
   }