Merge pull request #1971 from thaJeztah/bump-golang-to-1.8.4

Bump Go to 1.8.4

libnetwork/Dockerfile.build

@@ -1,4 +1,4 @@
-FROM golang:1.8.3
+FROM golang:1.8.4
 RUN apt-get update && apt-get -y install iptables
 
 RUN go get github.com/tools/godep \