debian: Update changelog to 0.15.1-fw.9

Change-Id: I37eeeb0a9da6e466a307b9f5ade29561a435bc5f
diff --git a/debian/changelog b/debian/changelog
index 57d9688..94a85a2 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+openbsc (0.15.1-fw.9) UNRELEASED; urgency=medium
+
+  * Implement SMS online ECUR charging
+
+ -- Ivan Klyuchnikov <kluchnikovi@gmail.com>  Mon, 21 May 2017 19:46:23 +0200
+
 openbsc (0.15.1-fw.8) UNRELEASED; urgency=medium
 
   * Implement proper handover procedure handling at any stage of the call