ndn-cxx: Update to the latest version

Change-Id: Ic287de92e52f102d392c11effea0395600d6d180
diff --git a/ndn-cxx/Makefile b/ndn-cxx/Makefile
index c8a434b..487ebb1 100644
--- a/ndn-cxx/Makefile
+++ b/ndn-cxx/Makefile
@@ -2,13 +2,13 @@
 GIT_URL=https://github.com/named-data/ndn-cxx.git
 
 # Tag name or commit hash for checkout
-GIT_VERSION=ndn-cxx-0.8.1
+GIT_VERSION=49e1e87b24da0bfdf61c0cd965bfc11164026192
 
 # Package name
 NAME=ndn-cxx
 
 # Package version
-VERSION=0.8.1-bp2
+VERSION=0.8.1-bp4-43-g49e1e87b2
 
 # PPA version
 PPA_VERSION=1