nlsr: Don't use ndn aliases provided by ndn-cxx/common.hpp

refs: #3983

Change-Id: I31da8d68e0285dcfe9c7d3e5e678c00397d22bef
diff --git a/src/update/prefix-update-processor.hpp b/src/update/prefix-update-processor.hpp
index e91fd1f..b1347b8 100644
--- a/src/update/prefix-update-processor.hpp
+++ b/src/update/prefix-update-processor.hpp
@@ -69,7 +69,7 @@
                         SyncLogicHandler& sync,
                         const ndn::Name broadcastPrefix,
                         ndn::KeyChain& keyChain,
-                        ndn::shared_ptr<ndn::CertificateCacheTtl> certificateCache,
+                        std::shared_ptr<ndn::CertificateCacheTtl> certificateCache,
                         security::CertificateStore& certStore);
 
   void