Bug#919500: golang-github-grpc-ecosystem-grpc-gateway: build dependency on golang-google-genproto-dev must be bumped to (>= 0.0~git20190111.db91494)

[Arnaud Rebillout]

  Dear Go team,

I pushed a fix on Salsa, can you please review and upload these changes?
Thanks!

Regards,

  Arnaud