tools: move rbtlog from other to orchestrators

<a href="https://github.com/fepitre/package-rebuilder/pulls" class="btn btn-outline-primary btn-sm">Merge requests</a>

<a href="https://archlinux.org/packages/extra/x86_64/rebuilderd/" class="btn btn-outline-primary btn-sm">Arch Linux package</a>

### Reproducible Builds Transparency Log (rbtlog)

`rbtlog` is a Reproducible Builds transparency log for Android APKs. Its git repository contains:

- Scripts forming a rebuilder framework.

- Recipes to build various apps.

- Rebuild Logs forming a transparency log of reproduction attempts.

- GitHub Actions workflows to automate everything.

<a href="https://github.com/obfusk/rbtlog" class="btn btn-outline-primary btn-sm">Git</a>

<a href="https://github.com/obfusk/rbtlog/issues" class="btn btn-outline-primary btn-sm">Issues</a>

<a href="https://github.com/obfusk/rbtlog/pulls" class="btn btn-outline-primary btn-sm">Merge requests</a>

<a href="https://gitlab.com/obfusk/rbtlog" class="btn btn-outline-primary btn-sm">GitHub mirror</a>

## rebuilder-backends

- [reproducible-build-maven-plugin](https://zlika.github.io/reproducible-build-maven-plugin) for the [Apache Maven](https://maven.apache.org) build tool, popular with Java projects.

- [sbt-reproducible-builds](https://github.com/raboof/sbt-reproducible-builds#readme) plugin for the [sbt](https://www.scala-sbt.org/) build tool, popular with [Scala](https://www.scala-lang.org/) projects.

- [apksigcopier](https://github.com/obfusk/apksigcopier) and [reproducible-apk-tools](https://github.com/obfusk/reproducible-apk-tools) for creating reproducible Android APKs and comparing APK (meta)data.

- [rbtlog](https://github.com/obfusk/rbtlog): a rebuilder framework with recipes to build Android APKs for various apps and rebuild logs forming a transparency log of reproduction attempts.

- [diffoci](https://github.com/reproducible-containers/diffoci): diff for Docker and OCI (Open Container Initiative) container images

## outside the above model