changed makefile to be more buildroot modification friendly: added os check for creating PYLIB
changed makefile to be more buildroot modification friendly: added os check for creating PYLIB

OnionIoT/i2c-exp-driver,OnionIoT/i2c-exp-driver,OnionIoT/i2c-exp-driver,OnionIoT/i2c-exp-driver,OnionIoT/i2c-exp-driver