[gnome-control-center] (6 commits) Non-fast-forward update to branch gbsneto/build-system-improvements

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

The branch 'gbsneto/build-system-improvements' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  df49052... project: Move build files to build-aux
  0873629... project: Add a development flatpak manifest
  90b799b... build: Add build profiles
  810dc0b... window: Change headerbar color on development builds
  dd3b47a... window: Warn about flatpak builds

Commits added to the branch:

  057610e... docs: Fix code block (*)
  6666867... CI: pass build artifacts to another stage (*)
  9460bab... CI: use an updated Docker image (*)
  e2a18be... project: Move build files to build-aux
  980e73b... project: Add a development flatpak manifest
  894f8e3... window: Warn about development builds

(*) This commit already existed in another branch; no separate mail sent