Add script to install go version from versions file

[jcvenegas]

From: @jodh-intel in clearcontainers/runtime#1086

Actually, there are a couple of issues here:

fwics we're building packages with go 1.7 fwics:

https://github.com/clearcontainers/packaging/blob/master/.ci/setup.sh#L26

The dev guide mention 1.8.3:

https://github.com/clearcontainers/runtime/blob/master/docs/developers-clear-containers-install.md#requirements-to-build-individual-components

In summary:

we're building packages with a very old version of go
we're recommending developers build with an old version of go (but newer than the packaging version).
we're testing with a newer (but not the latest) version of go.
We have a plan for how to resolve this for Kata but it's something we should be aware of I think:

kata-containers/runtime#114 (comment)

To reduce this gap we should consider add to our ci an script that installs a go version defined in versions.txt file from runtime.