cloudfoundry-cli: init at 6.32.0

[risicle]

Motivation for this change

Add the cloudfoundry cli app.

Note that though I'm putting myself as the maintainer of this package, I am really not a Go person, and I found that to be quite an impediment when getting this damn thing to compile.

Why 6.30.0 when latest is 6.33.0? 6.30.0 is the latest version that builds with Go 1.8 - I'm intending to immediately backport this to release-17.09 which has no buildGoPackage for Go 1.9 (and maybe we should leave it as such). We can give master a followup version bump afterwards if so desired.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

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[orivej]

Well done! I suppose we are going to update Go in release to 1.9 (#29173 (comment)), and now that there is a use, I'd submit a PR today.

[orivej]

Go 1.9 is now in the release-17.09 branch. Will you update the package?

[risicle]

Updated and rebased.

[orivej]

Added bash completions; released in 0990eea.

[risicle]

Awesome!