Set target property 'CTK_LIB_TARGET_SOURCE_DIR' on each CTK libraries

This property is set to be the value of ${CMAKE_CURRENT_SOURCE_DREICTORY}

CMake/ctkMacroBuildLib.cmake

@@ -133,6 +133,7 @@ MACRO(ctkMacroBuildLib)
   IF(CTK_LIBRARY_PROPERTIES AND MY_LIBRARY_TYPE STREQUAL "SHARED")
     SET_TARGET_PROPERTIES(${lib_name} PROPERTIES ${CTK_LIBRARY_PROPERTIES})
   ENDIF()
+  SET_TARGET_PROPERTIES(${lib_name} PROPERTIES CTK_LIB_TARGET_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
   # Install rules
   IF(CTK_BUILD_SHARED_LIBS)