snappy: switch defaultcc to golang-codereviews.
snappy: switch defaultcc to golang-codereviews.

LGTM=dsymonds
R=dsymonds
CC=golang-codereviews
https://codereview.appspot.com/201180043

bububa/snappy-go,shuxieliu/snappy-go,jaredye/snappy-go,btcsuite/snappy-go,tsanyen/snappy-go,ahirmayur/snappy-go,lzbgt/snappy-go,extrame/snappy-go,hankya/snappy-go,alehano/snappy-go,dmbreaker/snappy-go,chenny7/snappy-go,FactomProject/snappy-go,citysir/snappy-go,shanemhansen/snappy-go,xman1101/snappy-go,apeshave/snappy-go,boljen/snappy-go,anunui/snappy-go,eryx/snappy-go,andrew-d/snappy-go,zvictorino/snappy-go,golang/snappy,hqjia/snappy-go,monkeybutter/snappy,weilikd/snappy-go,matveyco/snappy-go,alexaandru/snappy-go,FactomProject/snappy-go,jmatrix/snappy-go,tsenart/snappy-go,bmatsuo/snappy,leywar/snappy-go,sbinet/go-snappy,mengjinglei/snappy-go,golang/snappy,pzduniak/snappy-go,winlinvip/snappy,mingzhi/snappy-go,syndtr/gosnappy,dereknex/snappy-go,lvzhihao/snappy-go,lanfeust21/snappy-go,MuruganMuthu/snappy-go