Bump version to 1.12.2+imx-4

Change-Id: I2aa5aa802ef36c83f22204b33d267afe611c0eb0
diff --git a/debian/changelog b/debian/changelog
index 9fe65d6..b1cab16 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+imx-gst-plugins-good (1.12.2+imx-4) mendel-beaker; urgency=medium
+
+  * Disable all libv4l2 emulated formats with V4L2_DISABLE_CONVERSION.
+
+ -- AIY Projects <support-aiyprojects@google.com>  Wed, 06 Feb 2019 16:56:06 -0800
+
 imx-gst-plugins-good (1.12.2+imx-3) mendel-beaker; urgency=medium
 
   * Cut for beaker branch