Deal with case of nor pre-existing .pth file
Deal with case of nor pre-existing .pth file

Add support for a perfectly clean virtualenv that doesn't have a
_virtualenv_path_extensions.pth file already.

Dark5ide/mycroft-core,MycroftAI/mycroft-core,linuxipho/mycroft-core,forslund/mycroft-core,forslund/mycroft-core,Dark5ide/mycroft-core,linuxipho/mycroft-core,aatchison/mycroft-core,MycroftAI/mycroft-core,aatchison/mycroft-core