Bumps the Go version used to 1.8.4, which contains security fixes; https://groups.google.com/forum/#!topic/golang-announce/1hZYiemnkdE Signed-off-by: Sebastiaan van Stijn <github@gone.nl> Upstream-commit: 9f50d4449ab79e467e7c2a2a498bf00ebd9db48c Component: packaging