Update ChangeLog to record release dates at least
diff --git a/ChangeLog b/ChangeLog
index d1b4248..f8e43f8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+2019-01-22  Google Inc. <opensource@google.com>
+
+	* google-glog: version 0.4.0.
+	* See git log for the details.
+
+2017-05-09  Google Inc. <opensource@google.com>
+
+	* google-glog: version 0.3.5
+	* See git log for the details.
+
+2015-03-09  Google Inc. <opensource@google.com>
+
+	* google-glog: version 0.3.4
+	* See git log for the details.
+
 2013-02-01  Google Inc. <opensource@google.com>
 
 	* google-glog: version 0.3.3