Add section/priority for source package

Change-Id: Iffb1ae3c33c1c88d0fb6be73f19b9fc0e36b4949
diff --git a/debian/control b/debian/control
index 9d32f91..d621b06 100644
--- a/debian/control
+++ b/debian/control
@@ -1,6 +1,8 @@
 Source: aiy-board-tools
 Maintainer: AIY Projects <support-aiyprojects@google.com>
 Build-Depends: debhelper, gnupg
+Section: misc
+Priority: optional
 
 Package: aiy-board-tools
 Section: misc