Merge pull request #2042 from jongwu/dockerfile.patch

enable unit test in arm64

libnetwork/Dockerfile.build

@@ -1,4 +1,4 @@
-FROM golang:1.8.4
+FROM golang:1.8.5
 RUN apt-get update && apt-get -y install iptables
 
 RUN go get github.com/tools/godep \