Sample application `cpp-library-example` includes opencv and needs `cmake`
and `libjpeg-dev` in the SDK to build.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

Current app build failed with following error:
```
$ rsync -e "ssh -oStrictHostKeyChecking=no -i $ARCHIVE_SECRET_FILE" -aP ~/.cache/flatdeb/ostree-repo/. "$upload_host:$UPLOAD_ROOT"
sending incremental file list
rsync: change_dir "/root/.cache/flatdeb/ostree-repo" failed: No such file or directory (2)
```
This commit create a temporary repo directory used by `flatpak-builder`.
Set correct rights so the repository is accessible after upload.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

Uploading runtime reset flatpak summary and hide other uploaded bundles.
Running `flatpak build-update-repo` fixes it.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

This recipe should be used in Mildenhall projects to automatically build
the flatpak bundle.
This install the runtime and SDK from
`https://images.apertis.org/public/flatpak/mildenhall`

, then build the
bundle using flatpak-recipe.yaml found at project's root.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

Embed runtime upload to `images.apertis.org` in `build-runtime` job
instead of a separated job which consume runners and time.
Main runtime is uploaded to `/srv/images/public/flatpak/mildenhall`
MRs are uploaded to `/srv/images/test/flatpak/mildenhall/$CI_COMMIT_REF_SLUG`

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

`helloworld-app` needs `gobject-introspection` and `hotdoc-0.8` to build.
Add them to the flatpak org.apertis.mildenhall.Sdk.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

Artifacts failed to upload in gitlab-ci due to its size.
This should be fixed later.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

`v2021dev2-package-builder` is only available from
`registry.gitlab.apertis.org`

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

The runtime and SDK are uploaded to
https://images.apertis.org/public/flatpack/mildenhall



Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

Apertis development repository branch is added in runtime recipe, and not
in suite recipe, using pre_apt_script to avoid conflicts between GPLv2 and
GPLv3 packages.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>