security: Hiding sqlite3 from the header of SecPublicInfoSqlite

Change-Id: Ic45d06b013bbe8f96f9472a6f8b95d02820437f5
diff --git a/src/security/sec-public-info-sqlite3.cpp b/src/security/sec-public-info-sqlite3.cpp
index 6c1ea7b..9f2ca13 100644
--- a/src/security/sec-public-info-sqlite3.cpp
+++ b/src/security/sec-public-info-sqlite3.cpp
@@ -10,6 +10,7 @@
 #include <ndn-cpp-dev/ndn-cpp-config.h>
 #ifdef NDN_CPP_HAVE_SQLITE3
 
+#include <sqlite3.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sstream>