make: Add a lintian target so we can verify our packages are sane

Change-Id: I0afc43c2ab657826f88f70c6ca38bbe386703782
diff --git a/Makefile b/Makefile
index 845e14b..053db2a 100644
--- a/Makefile
+++ b/Makefile
@@ -32,6 +32,9 @@
 
 all: rootfs bootloader partition-table
 
+lintian: packages
+	lintian $(PRODUCT_OUT)/packages/core/*.deb $(PRODUCT_OUT)/packages/bsp/*.deb
+
 help: targets
 targets::
 	@echo "Targets available for building in this Makefile:"