add support for local package repos indication

Change-Id: Ia669af4ef784455d2fbd437721d95c549a75223f
diff --git a/linux/system/single.yml b/linux/system/single.yml
index d7e03e8..122171b 100644
--- a/linux/system/single.yml
+++ b/linux/system/single.yml
@@ -4,8 +4,11 @@
 - system.openssh.server.single
 - system.ntp.client.single
 parameters:
+  _param:
+    local_package_repos: false
   linux:
     system:
+      local_package_repos: ${_param:local_package_repos}
       user:
         root:
           enabled: true