nfd: Update to version 0.4.1

Change-Id: I75b02f26c80bc90fbce0f9ae52943621c632ec03
diff --git a/nfd/debian/control b/nfd/debian/control
index 00d863b..f7961dc 100644
--- a/nfd/debian/control
+++ b/nfd/debian/control
@@ -5,7 +5,7 @@
  dh-systemd (>= 1.5),
  python (>= 2.7.0),
  pkg-config (>= 0.26),
- ndn-cxx-dev (>= 0.4.0),
+ ndn-cxx-dev (>= 0.4.1),
  python-sphinx,
  libpcap-dev,
  libboost-all-dev (>= 1.48.0)