Add Nova fibre channel support required packages

This patch is to support the nova patch that adds
Fibre Channel support to nova.  Fibre Channel requires
sysfsutils, sg3-utils, multipath-tools

Change-Id: I9e44ef9152f1916b245dba3be77076f0283fed44
diff --git a/files/apts/n-cpu b/files/apts/n-cpu
index a40b659..ad2d6d7 100644
--- a/files/apts/n-cpu
+++ b/files/apts/n-cpu
@@ -3,3 +3,5 @@
 open-iscsi
 open-iscsi-utils
 genisoimage
+sysfsutils
+sg3-utils