ci: Add script to enable checks with Travis CI

Change-Id: I5345a67dc588228df5560139477fa9236a6b437d
diff --git a/wscript b/wscript
index e9ef718..45d2a32 100644
--- a/wscript
+++ b/wscript
@@ -72,7 +72,7 @@
         deps.append('visualizer')
 
     if bld.env.ENABLE_EXAMPLES:
-        deps += ['point-to-point-layout', 'csma', 'applications']
+        deps += ['point-to-point-layout', 'csma', 'applications', 'wifi']
 
     module = bld.create_ns3_module ('ndnSIM', deps)
     module.module = 'ndnSIM'