build: use C++11

Change-Id: I0e58ac4e9cb42d07a9b58125d761875f91c7744c
Refs: #1930
diff --git a/src/handles/base-handle.hpp b/src/handles/base-handle.hpp
index 44ac4a8..95b8caa 100644
--- a/src/handles/base-handle.hpp
+++ b/src/handles/base-handle.hpp
@@ -110,7 +110,7 @@
 inline void
 BaseHandle::reply(const Interest& commandInterest, const RepoCommandResponse& response)
 {
-  shared_ptr<Data> rdata = make_shared<Data>(commandInterest.getName());
+  std::shared_ptr<Data> rdata = std::make_shared<Data>(commandInterest.getName());
   rdata->setContent(response.wireEncode());
   m_keyChain.sign(*rdata);
   m_face.put(*rdata);