CMake: Added missing jsoncpp dependency

source/RobotAPI/libraries/robotstate/remote/test/CMakeLists.txt

-set(LIBS ${LIBS} RobotAPIRemoteRobot ArmarXCoreJsonObject)
+find_package(jsoncpp QUIET)
+
+armarx_build_if(jsoncpp_FOUND "jsoncpp not available")
+
+if (jsoncpp_FOUND)
+    include_directories(${jsoncpp_INCLUDE_DIR})
+endif()
+
+
+set(LIBS ${LIBS} RobotAPIRemoteRobot ArmarXCoreJsonObject ${jsoncpp_LIBRARIES})
 
 armarx_add_test(ArmarPoseTest ArmarPoseTest.cpp "${LIBS}")