fix PYTHON_LIBS
fix PYTHON_LIBS

on some platforms there are extra libs needed when linking with -lpython,
for example -pthread and -lutil on OpenBSD

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core