remove go 1.1 from the build targets
remove go 1.1 from the build targets

ezoic/dns,letsencrypt/dns,josephyzhou/dns,curtiszimmerman/dns,hugozhu/dns,janstk/dns,michaelharo/dns,rolandshoemaker/dns,skyportsystems/dns,Psiphon-Inc/dns,skynet/dns,Git-Host/dns,ErikDubbelboer/dns,bragr/dns,bboreham/dns,jmhodges/dns,modulexcite/dns,asergeyev/dns,tsenart/dns,tempbottle/dns,flebarbe/dns,miekg/dns,cloudflare/dns,ym/go-dns,AlexCheong/dns,jdef/dns,benbearchen/dns