Added library dir of python for plugins

cmake/plugin.cmake

@@ -643,7 +643,8 @@ function (_build_openflipper_plugin plugin)
       if(PYTHON3_FOUND)
         message("Trying to build ${_PLUGIN}_PYTHONINTERFACE ")
         acg_append_files (sources  "*.cc" PythonInterface)
-   
+
+        link_directories(${Python3_LIBRARY_DIRS})
         include_directories( ${Python3_INCLUDE_DIRS} )
         add_definitions(-DPYTHONINTERFACE_ENABLED)
       endif()