ndn-traffic-generator: Update

Change-Id: If05d79762350feac7d7284adef19bad0881554fe
diff --git a/ndn-traffic-generator/debian/rules b/ndn-traffic-generator/debian/rules
index e902165..7e02827 100755
--- a/ndn-traffic-generator/debian/rules
+++ b/ndn-traffic-generator/debian/rules
@@ -11,7 +11,7 @@
 
 LDFLAGS := $(shell dpkg-buildflags --get LDFLAGS)
 CXXFLAGS := $(shell dpkg-buildflags --get CXXFLAGS)
-CXXFLAGS += -std=c++11
+CXXFLAGS += -std=c++14
 LIBDIR := /usr/lib/$(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
 
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