Richard Miller

x/build/cmd/coordinator: write_go_bootstrap_tar failing with 404 on some arm builders

7

### Go version gotip ### Output of `go env` in your module/workspace: ```shell n/a ``` ### What did you do? Observed https://farmer.golang.org ### What did you see happen? ``` [plan9-arm](https://github.com/golang/go/wiki/DashboardBuilders)...