nfd: Don't install upstart script for nrd and make sure default certificates are correct

Change-Id: I665dc568e0f5f5cc92e461977175a7f40d6d2e0d
Refs: #10, #9, #5
diff --git a/nfd/Makefile b/nfd/Makefile
index c3e0d2c..e3afaa0 100644
--- a/nfd/Makefile
+++ b/nfd/Makefile
@@ -11,6 +11,6 @@
 VERSION=0.3.1
 
 # PPA version
-PPA_VERSION=2
+PPA_VERSION=3
 
 include ../packaging.mk