Merge pull request #1185 from thaJeztah/switch-to-go-1.5.4

Switch to golang 1.5.4

libnetwork/Dockerfile.build

@@ -1,4 +1,4 @@
-FROM golang:1.5.3
+FROM golang:1.5.4
 RUN apt-get update && apt-get -y install iptables
 
 RUN go get github.com/tools/godep \