Changing onos buck alias to include package generation.

Fixing buck build of scalablegateway app.

Change-Id: I165bdf38682f694667678adc6a9d835c50b48ed3
diff --git a/.buckconfig b/.buckconfig
index 2d6f94a..072fa53 100644
--- a/.buckconfig
+++ b/.buckconfig
@@ -6,7 +6,7 @@
   target_level = 8
 
 [alias]
-    onos = //:onos
+    onos = //tools/package:onos-package
     package = //tools/package:onos-package
 
 [download]