go.net/publicsuffix: add new eTLD test for IDNs.
go.net/publicsuffix: add new eTLD test for IDNs.

LGTM=nigeltao
R=nigeltao
CC=bradfitz, golang-codereviews
https://golang.org/cl/33810044

veliamsli/net,dafyddcrosby/net,albertjin/golang-net,zabawaba99/net,kiip/net,cmars/tools,gomini/net,mckinney-subgraph/net,flowlo/go-net,cesanta/goxnet,w4ngyi/net,cmars/tools,foreversmart/net,cmars/tools,dafyddcrosby/net,gomini/net,flowlo/go-net,cmars/tools,kiip/net,subuk/net,cesanta/goxnet,DramaFever/golang.org-x-net,golang/net,zabawaba99/net,DramaFever/golang.org-x-net,chenzlabs/net,subuk/net,muzining/net,foreversmart/net,yangxianjun/net,chenzlabs/net,veliamsli/net,muzining/net,mckinney-subgraph/net,w4ngyi/net,albertjin/golang-net,raboof/net,yangxianjun/net,raboof/net