[cmake] Fix CMakeLists.txt related to geometric_simu.

Integrate bug fixed in robotpkg.

CMakeLists.txt

@@ -153,7 +153,7 @@ pkg_config_use_dependency(interpreter dynamic_graph_bridge_msgs)
 # Stand alone embedded intepreter with a robot controller.
 add_executable(geometric_simu src/geometric_simu.cpp src/sot_loader.cpp)
 pkg_config_use_dependency(geometric_simu roscpp)
-target_link_libraries(geometric_simu  ros_bridge ${Boost_LIBRARIES} dl)
+target_link_libraries(geometric_simu  ros_bridge ${Boost_LIBRARIES} ${CMAKE_DL_LIBS})
 
 # Sot loader library
 add_library(sot_loader src/sot_loader.cpp)