install swarm-bench tool with go1.6 in raspberry pi 3

1.cd ~

2.mkdir build

3.cd build

4.git clone https://github.com/golang/go.git

5.cd go

6. git branch -av

7.git checkout -b go1.4 origin/release-branch.go1.4

8.export GOROOT_FINAL=/usr/local/go 
9.export GOARM=6

10.cd src

11./make.bash

12.cp -af build/go  /usr/local/go

13.set GOPATH for working directory

   export GOPATH=/tmp

## install swarm bench tool

14.go get github.com/aluzzardi/swarm-bench