hack/scripts-dev: Makefile with Go 1.9.4, 1.8.7
hack/scripts-dev: Makefile with Go 1.9.4, 1.8.7

Signed-off-by: Gyuho Lee <3454051ee3341eb69bdf6fca40899cdad4d86496@gmail.com>

rnaveiras/etcd,vimalk78/etcd,gyuho/etcd,li-ang/etcd,mqliang/etcd,bdarnell/etcd,rnaveiras/etcd,cockroachdb/etcd,lorneli/etcd,dannysauer/etcd,mqliang/etcd,joshix/etcd,joshix/etcd,etcd-io/etcd,whuwxl/etcd,fanminshi/etcd,xiang90/etcd,ajityagaty/etcd,glevand/coreos--etcd,bdarnell/etcd,li-ang/etcd,mkumatag/etcd,fanminshi/etcd,etcd-io/etcd,mkumatag/etcd,sinsharat/etcd,ajityagaty/etcd,xiang90/etcd,dannysauer/etcd,gyuho/etcd,coreos/etcd,rnaveiras/etcd,sebrandon1/etcd,vimalk78/etcd,mqliang/etcd,ajityagaty/etcd,lorneli/etcd,sebrandon1/etcd,sinsharat/etcd,coreos/etcd,whuwxl/etcd,cockroachdb/etcd,glevand/coreos--etcd,mkumatag/etcd,etcd-io/etcd