Mods for using on a Windows host, use LF instead of CRLF line ending

For using coreos-vagrant on a Windows host it's important to use Unix-style files with a LF line endings only.  This applies to "user-data" and "vagrant-user-data".  Otherwise the config files will be uploaded to CoreOS with CRLF line endings and some configurations are not done - the IPv4 address would not be set correctly!