[gnome-builder] (20 commits) Non-fast-forward update to branch wip/tintou/sysroot

[Corentin Noël <corentinnoel src gnome org>]

The branch 'wip/tintou/sysroot' 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:

  97b6415... sysroot: add a new plugin allowing to specify the sysroot
  35f0f20... sysroot: align with project code-style
  bffd9dd... sysroot: rename IdeSysroot* to GbpSysroot
  37c2487... sysroot: add documentation to the public methods
  e16c2b4... doc: add sysroot configuration to the documentation
  e75f570... sysroot: fix tiny code style issue
  532c7db... sysroot: try to guess the pkgconfig paths and always show t

Commits added to the branch:

  c5c3a2e... gitlabci: Initial .gitlab-ci.yml setup (*)
  7cc52a1... gitlabci: Try to add caching, also fix artifact extraction (*)
  a38accc... gitlabci: Fix submodules init. (*)
  9fd3c1c... gitlabci: build from pre-existing checkout (*)
  0974490... gitlabci: Disable tests for now. (*)
  a9d844b... cargo: fix comment (*)
  52feaf6... pipeline: add missing is_native() declaration (*)
  4aa7048... cargo: defer to cargo to check if build is up to date (*)
  a171621... Revert "transfers: try to stabilize label jitter a bit" (*)
  479dbd5... buildmanager: invalidate pipeline when branch changes (*)
  c3118e3... greeter: remove dead code (*)
  8cb1818... recent: secondary click selects and enters select mode (*)
  4e64a65... build: bump to 3.29.0 (*)
  c39addc... sysroot: add a new plugin allowing to specify the sysroot
  fb6beb3... sysroot: align with project code-style
  64f6d1c... sysroot: rename IdeSysroot* to GbpSysroot
  f780040... sysroot: add documentation to the public methods
  e8ea581... doc: add sysroot configuration to the documentation
  2f9ab09... sysroot: fix tiny code style issue
  2835923... sysroot: try to guess the pkgconfig paths and always show t

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