Update changelog for beaker

Change-Id: I40ce0222bba17fc81f32c532c3b4f98ad932b060
diff --git a/debian/changelog b/debian/changelog
index 79fbc45..9fe65d6 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+imx-gst-plugins-good (1.12.2+imx-3) mendel-beaker; urgency=medium
+
+  * Cut for beaker branch
+
+ -- AIY Projects <support-aiyprojects@google.com>  Wed, 16 Jan 2019 12:00:00 -0800
+
 imx-gst-plugins-good (1.12.2+imx-2) unstable; urgency=medium
 
   * Improved v4l2src performance (avoid copying frames when using a tee).