ndn-tools: Update to 0.4-4-g70750cf1

Change-Id: I13dfee462df4eaedff75c6c9eeb48c127b4ccf44
diff --git a/ndn-tools/debian/control b/ndn-tools/debian/control
index 6b5aef1..24204b2 100644
--- a/ndn-tools/debian/control
+++ b/ndn-tools/debian/control
@@ -7,7 +7,7 @@
  pkg-config (>= 0.26),
  libpcap-dev,
  python-sphinx,
- ndn-cxx-dev (>= 0.5.1)
+ ndn-cxx-dev (>= 0.5.1-60)
 Standards-Version: 3.9.2
 Section: net
 Homepage: http://github.com/named-data/ndn-tools