travis: skip vet install for 386 (#2018)
travis: skip vet install for 386 (#2018)


thinkerou/grpc-go,dfawley/grpc-go,grpc/grpc-go,stanley-cheung/grpc-go,improbable-io/grpc-go,MakMukhi/grpc-go,thinkerou/grpc-go,grpc/grpc-go,stanley-cheung/grpc-go,menghanl/grpc-go,improbable-io/grpc-go,MakMukhi/grpc-go,dfawley/grpc-go,menghanl/grpc-go