cmake: link tracking plugin private

Src/CMakeLists.txt

@@ -45,6 +45,6 @@ add_behavior_plugin(${target}
 
 install(TARGETS ${target} OPTIONAL DESTINATION .)
 find_package(Qt5 REQUIRED COMPONENTS Xml Network)
-target_link_libraries (${target} Qt5::Xml Qt5::Network)
+target_link_libraries (${target} PRIVATE Qt5::Xml Qt5::Network)
 
-target_link_libraries(${target} ${OpenCV_LIBS})
+target_link_libraries(${target} PRIVATE ${OpenCV_LIBS})