[mutter] (29 commits) Non-fast-forward update to branch wip/nielsdg/more-declarable-types

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

The branch 'wip/nielsdg/more-declarable-types' 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:

  4f1425c... Meta: use G_DECLARE_DERIVABLE/FINAL_TYPE

Commits added to the branch:

  a8e9f46... Add .gitlab-ci.yml for build testing (*)
  93e20cf... cogl/framebuffer: Mark CoglOffscreen as a CoglFramebuffer i (*)
  4ce4a2b... cogl: Expose more headers for introspection (*)
  fc5b94e... clutter: Install cally headers again when using autotools (*)
  c7e6cd4... plugins/Makefile.am: Install libdefault.so in plugin direct (*)
  c03a401... clutter: Install x11 related header files when using autoto (*)
  7c774ab... build: Also build mutter-restart-helper executable (*)
  cf7c39e... build: Add soversion to shared libraries (*)
  b86d874... build: Fix include and lib paths in autotools .pc files (*)
  d21478b... cogl-auto-texture: Avoid a double-free crash (*)
  f31cf0c... clutter-offscreen-effect: Disable if no texture (*)
  5fc07fc... window: Store tile mode as MetaTileMode (*)
  640a04d... window: Make edge constraint code more readable (*)
  27fee69... wayland/xdg-shell: Add helper for adding state enum values (*)
  d59cf98... wayland/gtk-shell: Fix signedness of resource version varia (*)
  180bb02... wayland/gtk-shell: Use helper to fill state array (*)
  4f3de88... wayland/legacy-xdg-shell: Use helper to fill state array (*)
  4673eea... wayland/xdg-shell: Add toplevel tile state support (*)
  4a7a803... README: Mention usage by Gala (*)
  3483be8... tests: Remove unused variables (*)
  426d7f3... tests: Enumerate all possible events (*)
  b5c4437... tests: Remove extra const (*)
  cbf6e74... tests: Remove deprecated ATK functions (*)
  3d23ecc... clutter: Drop g_object_newv from ClutterScriptParser (*)
  c5ac3d6... theme: Drop gtk_css_provider_get_default() (*)
  9969498... cogl: Silence some introspection warnings (*)
  1573285... clutter-shader: Don't include unistd.h (*)
  80d5f32... clutter: Assume XGE is available at build time (*)
  d81fe80... Meta: use G_DECLARE_DERIVABLE/FINAL_TYPE

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