Fix core/plugin include gurad
Fix core/plugin include gurad

jubatus/jubatus,kmaehashi/jubatus_core,rimms/jubatus_core,elkingtonmcb/jubatus,mathn/jubatus,gintenlabo/jubatus_core,gintenlabo/jubatus,kumagi/jubatus_core,rimms/jubatus,jubatus/jubatus,roselleebarle04/jubatus,gintenlabo/jubatus_core,rimms/jubatus_core,kmaehashi/jubatus,mathn/jubatus,roselleebarle04/jubatus,gintenlabo/jubatus_core,kmaehashi/jubatus_core,rimms/jubatus_core,gintenlabo/jubatus_core,kmaehashi/jubatus,Asuka52/jubatus,kumagi/jubatus_core,gintenlabo/jubatus,Asuka52/jubatus,kmaehashi/jubatus_core,rimms/jubatus_core,rimms/jubatus,jubatus/jubatus,kumagi/jubatus_core,kmaehashi/jubatus_core,kumagi/jubatus_core,elkingtonmcb/jubatus