add(coreos-base/oem-niftycloud): added initial oem for niftycloud

These are the initial oem scripts for niftycloud.
NIFTY Cloud is one of the most popular public cloud service in Japan.

cc: @kelseyhightower 
Does including it resolve your issue? If so perhaps the problem is having the DHCP broadcast flag enabled:
https://github.com/coreos/init/blob/master/systemd/network/yy-vmware.network

But if that was the case I'm not sure why it worked on 494 but not 522, that vmware network unit was added in 471.