Add go 1.6.3, remove go 1.6.1
Add go 1.6.3, remove go 1.6.1

[#126516829]

Signed-off-by: Sam Smith <03a07629efb0a02c7bbe7cc340a4243da1ab861a@gmail.com>

cloudfoundry/go-buildpack,cloudfoundry/go-buildpack,cloudfoundry/go-buildpack