Resolve compilation issues (more accurate with headers)
diff --git a/helper/ccnb-parser/syntax-tree/ccnb-parser-attr.cc b/helper/ccnb-parser/syntax-tree/ccnb-parser-attr.cc
index e4baf54..bdc1f0a 100644
--- a/helper/ccnb-parser/syntax-tree/ccnb-parser-attr.cc
+++ b/helper/ccnb-parser/syntax-tree/ccnb-parser-attr.cc
@@ -19,7 +19,7 @@
  */
 
 #include "ccnb-parser-attr.h"
-#include "ns3/ccnb-parser-common.h"
+#include "../ccnb-parser-common.h"
 
 namespace ns3 {
 namespace CcnbParser {