fix signature generation failing under win32

tizzybec

2019-06-12 f0bab602c0d361f66a112e5a2db312b0da7dcd55

 CMakeLists.txt

@@ -98,6 +98,7 @@
       list(APPEND EXTERNAL_LIBS ${DBUS_LIBRARIES})
   endif(USE_DBUS_IDENTIFIER)    
   list(APPEND EXTERNAL_LIBS dl)
   list(APPEND EXTERNAL_LIBS "-Wl,-Bdynamic")
endif(NOT MSVC)

configure_file (