Add 'bblfsh-cli' binaries to the release assets

[dpordomingo]

Could you add bblfsh-cli binaries (for the considered platforms) to the released assets?
that way it could be directly wgeted ;)

[creachadair]

Do you mean a binary build of the client itself? Right now we only have source tarballs for the client which are platform-independent. I think we'd have to choose a set of platforms to target. Or did you mean a subset of the source release?

[dpordomingo]

I think it could be useful for some people if thebblfsh-cli binary could be downloaded from the release assets, ready to be used without compiling it from sources.

[creachadair]

It makes sense, but if we're going to start pushing binary releases I think we should do it consistently for the various bblfsh projects. Unfortunately "the" binary isn't clearly defined, since it varies by platform (even in some cases across Linux versions). I'd be willing to update the issue to a more general "release binaries" request, though.

[dpordomingo]

Oh, sorry, I realized that I described the problem as a user, only cared about his problem.
For sure, it should be considered different users from different platforms.

As an example, in Apps we deliver lookout-sdk for linux and darwin (example), and engine for linux, darwin, and windows (example), being the decision based on available time and prod necessities.

ps. I updated the issue desc in that direction, but feel free to edit it more accord to your preferences.