[vala] (6 commits) Non-fast-forward update to branch wip/meson

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/meson' 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:

  e351452... g-i: Fix deprecation warnings
  14827b7... Add initial Meson build system
  ab11151... meson: Avoid object clash of scanner.vala in libvaladoc
  9549f20... meson: Add tests

Commits added to the branch:

  7b468bc... codegen: Include glib-object.h for Enums with type_id (*)
  2bac070... g-i: Fix deprecation warnings (*)
  318f378... codegen: Include glib-object.h for Structs with type_id (*)
  f9a5a3f... Add initial Meson build system
  475c48b... meson: Avoid object clash of scanner.vala in libvaladoc
  ed47ff4... meson: Add tests

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