ndncert: Update

Change-Id: I9af390b4689a0cfb92b5be720ed2fd3661209d77
diff --git a/ndncert/debian/control b/ndncert/debian/control
index 48bf003..c3fdb89 100644
--- a/ndncert/debian/control
+++ b/ndncert/debian/control
@@ -4,7 +4,7 @@
 Build-Depends: debhelper (>= 8.0.0),
  python (>= 2.7.0),
  pkg-config (>= 0.26),
- libndn-cxx-dev (>= 0.6.1)
+ libndn-cxx-dev (>= 0.6.5)
 Standards-Version: 3.9.2
 Section: net
 Homepage: http://github.com/named-data/ndncert