[pkg-go] golang-google-genproto is marked for autoremoval from testing

[Debian testing autoremoval watch]

golang-google-genproto 0.0~git20170731.0.09f6ed2-1 is marked for autoremoval from testing on 2018-01-06

It (build-)depends on packages with these RC bugs:
882554: golang-google-grpc: golang-google-grpc FTBFS: stringer: checking package: code_string.go:5:8: could not import fmt (can't find import: )