Adding Z(s390x) binaries to releases page

Just like #161, I am trying build “fluentd” dockerfile, but running into a 404 issue when it tries to grab https://github.com/Yelp/dumb-init/releases/download/v1.2.1/dumb-init_1.2.1_s390x.

This process would be easy if Travis did support s390x, but they do not. If/when Travis does I am happy to help set up a Travis build just like @ghatwala did for power.

In the meantime I am open to suggestions. I usually recommend to open source projects, to sign up for the LinuxONE Community Cloud which will give you access to a Linux instance hosted on a s390x platform.

It is total free and will not cost you anything. The only downside is I think it has 90 or 120 day limit. If you are interested in this, let me know and I can see if we can extend the day limit.

[asottile]

It was pretty straightforward – I made a ticket with some github usernames and was enabled within 24 hours (though they mention SLA on that is ~7 days, but it was very quick). Beyond that they give access to a jenkins instance that you log in with a github username

we didn’t hook it up for PRs afaik, but it builds after-the-fact on merge to master

We did have to add some manual steps to upload, but they’re not too difficult: #190

[james-crowley]

@chriskuehl Works like a charm! I appreciate all your help and your support for the s390x platform!