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