psync: Update to the latest version

Change-Id: I696a1534563e2ae9012fdbdde1bc7e53253de158
diff --git a/libpsync/Makefile b/libpsync/Makefile
index a820dad..994a090 100644
--- a/libpsync/Makefile
+++ b/libpsync/Makefile
@@ -2,13 +2,13 @@
 GIT_URL=https://github.com/named-data/PSync.git
 
 # Tag name or commit hash for checkout
-GIT_VERSION=32ccfc4d1d4db648763bf96ffdf8ac87f0bc3f50
+GIT_VERSION=60e5043d0c33669232c96c926b77031b25d00321
 
 # Package name
 NAME=libpsync
 
 # Package version
-VERSION=0.3.0-9-g32ccfc4
+VERSION=0.4.0-8-g60e5043
 
 # PPA version
 PPA_VERSION=1