Enabled :path_style for Google Cloud Storage for allowing CNAME buckets

e.g. paperclip configuration:
config.paperclip_defaults = {
      storage: :fog,
      fog_credentials: {
        provider: provider,
        google_storage_access_key_id: access_key_id,
        google_storage_secret_access_key: secret_access_key,
        path_style: true
      },
      fog_public: true,
      fog_directory: host,
      fog_host: 'http://' + host
    }