tools: nfdc face destroy command

refs #3864

Change-Id: I1d070570c14364529c566273eba44b87413942b1
diff --git a/tools/nfdc/face-module.hpp b/tools/nfdc/face-module.hpp
index 1bbc31b..3f70d48 100644
--- a/tools/nfdc/face-module.hpp
+++ b/tools/nfdc/face-module.hpp
@@ -56,6 +56,11 @@
   static void
   create(ExecuteContext& ctx);
 
+  /** \brief the 'face destroy' command
+   */
+  static void
+  destroy(ExecuteContext& ctx);
+
   void
   fetchStatus(Controller& controller,
               const function<void()>& onSuccess,