Add missing separator in dependency list

Change-Id: I62757669d8b5b7cb6c03a06f8fceab080fe74c48
diff --git a/debian/control b/debian/control
index 4468d1e..abba376 100644
--- a/debian/control
+++ b/debian/control
@@ -13,6 +13,6 @@
          gstreamer1.0-plugins-good,
          python3-gi,
          python3-gst-1.0,
-         python3-minimal
+         python3-minimal,
          weston-imx
 Description: Miscellaneous tools to support the AIY Board