Force rebuild after ndn-cxx changes

Packages included:
- ndn-tools
- ndn-traffic-generator
- ndncert,
- ndnmap-data-collector
- repo-ng

Change-Id: Icee3e46f164c71eaad524cc5f4a6ac76efed8136
Fixes: #12
diff --git a/ndnmap-data-collector/Makefile b/ndnmap-data-collector/Makefile
index 4523185..460d011 100644
--- a/ndnmap-data-collector/Makefile
+++ b/ndnmap-data-collector/Makefile
@@ -11,6 +11,6 @@
 VERSION=0.1.0-12-gaff60ff
 
 # PPA version
-PPA_VERSION=1
+PPA_VERSION=2
 
 include ../packaging.mk