build: avoid gossip/simulation code rot
build: avoid gossip/simulation code rot

go build <path>/... apparently doesn't bother with package main.

il9ue/cockroach,cockroachdb/cockroach,sunya123/cockroach,vivekmenezes/cockroach,paperstreet/cockroach,paperstreet/cockroach,cuongdo/cockroach,arjun4084346/cockroach,cuongdo/cockroach,vivekmenezes/cockroach,sunya123/cockroach,vaibhavarora/cockroach,petermattis/cockroach,cockroachdb/cockroach,veteranlu/cockroach,maxlang/cockroach,glycerine/cockroach,vaibhavarora/cockroach,petermattis/cockroach,arjun4084346/cockroach,il9ue/cockroach,maxlang/cockroach,glycerine/cockroach,glycerine/cockroach,cockroachdb/cockroach,glycerine/cockroach,nieyy/cockroach,il9ue/cockroach,vaibhavarora/cockroach,il9ue/cockroach,maxlang/cockroach,arjun4084346/cockroach,cuongdo/cockroach,vivekmenezes/cockroach,maxlang/cockroach,cuongdo/cockroach,cockroachdb/cockroach,bg451/cockroach,cockroachdb/cockroach,paperstreet/cockroach,bg451/cockroach,cuongdo/cockroach,bg451/cockroach,nieyy/cockroach,sunya123/cockroach,maxlang/cockroach,petermattis/cockroach,petermattis/cockroach,vaibhavarora/cockroach,maxlang/cockroach,cuongdo/cockroach,bg451/cockroach,glycerine/cockroach,cockroachdb/cockroach,il9ue/cockroach,petermattis/cockroach,veteranlu/cockroach,glycerine/cockroach,glycerine/cockroach,paperstreet/cockroach,sunya123/cockroach,glycerine/cockroach,vivekmenezes/cockroach,maxlang/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,il9ue/cockroach,arjun4084346/cockroach,sunya123/cockroach,nieyy/cockroach,vivekmenezes/cockroach,bg451/cockroach,cockroachdb/cockroach,arjun4084346/cockroach,bg451/cockroach,maxlang/cockroach,cockroachdb/cockroach,vivekmenezes/cockroach,petermattis/cockroach,bg451/cockroach,nieyy/cockroach,vaibhavarora/cockroach,vivekmenezes/cockroach,arjun4084346/cockroach,veteranlu/cockroach,nieyy/cockroach,paperstreet/cockroach,il9ue/cockroach,nieyy/cockroach,sunya123/cockroach,paperstreet/cockroach,veteranlu/cockroach,veteranlu/cockroach,vivekmenezes/cockroach,veteranlu/cockroach,arjun4084346/cockroach,nieyy/cockroach,petermattis/cockroach,arjun4084346/cockroach,il9ue/cockroach,paperstreet/cockroach,petermattis/cockroach,vaibhavarora/cockroach,sunya123/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,nieyy/cockroach,cuongdo/cockroach,veteranlu/cockroach,sunya123/cockroach,cuongdo/cockroach