updateHostsFile.py: add ipv6 additionals
updateHostsFile.py: add ipv6 additionals

@StevenBlack.
DEFAULT hosts file in Linux

127.0.0.1       localhost
127.0.1.1       mydevicename
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
borisschapira/hosts,StevenBlack/hosts,StevenBlack/hosts,gfyoung/hosts,gfyoung/hosts