The package golang-github-golang-protobuf-1-5 1.5.2-3 has been added to kali-rolling. It has been imported from Debian: https://tracker.debian.org/pkg/golang-github-golang-protobuf-1-5 -- More information about golang-github-golang-protobuf-1-5: http://pkg.kali.org/pkg/golang-github-golang-protobuf-1-5