Misc fixes for impish builds

Change-Id: I68825a35c250a76c2293430271f6536d212fba3b
diff --git a/ndn-tools/Makefile b/ndn-tools/Makefile
index e1cb6c9..db49f39 100644
--- a/ndn-tools/Makefile
+++ b/ndn-tools/Makefile
@@ -11,6 +11,6 @@
 VERSION=0.7.1-28-g5998428e
 
 # PPA version
-PPA_VERSION=1
+PPA_VERSION=2
 
 include ../packaging.mk