build: switch to C++14

Change-Id: I7a32dad01e74ef5b7c5f37a5464d0b17a7882c61
Refs: #3076
diff --git a/daemon/face/face.hpp b/daemon/face/face.hpp
index 4a97b3f..a81a75e 100644
--- a/daemon/face/face.hpp
+++ b/daemon/face/face.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2017,  Regents of the University of California,
+ * Copyright (c) 2014-2018,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -68,7 +68,7 @@
 #ifndef WITH_TESTS
 final
 #endif
-  : public enable_shared_from_this<Face>, noncopyable
+  : public std::enable_shared_from_this<Face>, noncopyable
 {
 public:
   Face(unique_ptr<LinkService> service, unique_ptr<Transport> transport);