Fix pkg-config file for jubatus_core
Fix pkg-config file for jubatus_core

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