Fixed 'go-bindata command not found' in pipeline

.drone.yml

@@ -9,6 +9,7 @@ pipeline:
     image: golang:1.10
     commands:
       - go get -u github.com/golang/dep/cmd/dep
+      - go get -u github.com/jteeuwen/go-bindata/...
       - dep ensure
       - go generate ./...
       - mkdir /output