Fix initialize issue

Author: liuh-80

orchagent/orchdaemon.cpp

@@ -68,6 +68,8 @@ event_handle_t g_events_handle;
 #define DEFAULT_MAX_BULK_SIZE 1000
 size_t gMaxBulkSize = DEFAULT_MAX_BULK_SIZE;
 
+std::chrono::time_point<std::chrono::high_resolution_clock> OrchDaemon::m_lastHeartBeat = std::chrono::high_resolution_clock::now();
+
 OrchDaemon::OrchDaemon(DBConnector *applDb, DBConnector *configDb, DBConnector *stateDb, DBConnector *chassisAppDb) :
         m_applDb(applDb),
         m_configDb(configDb),

orchagent/orchdaemon.h

@@ -91,7 +91,7 @@ class OrchDaemon
     std::vector<Orch *> m_orchList;
     Select *m_select;
 
-    static std::chrono::time_point<std::chrono::high_resolution_clock> m_lastHeartBeat = std::chrono::high_resolution_clock::now();
+    static std::chrono::time_point<std::chrono::high_resolution_clock> m_lastHeartBeat;
 
     void flush();