[gtk+] (3 commits) Non-fast-forward update to branch wip/otte/vulkan

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/vulkan' 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:

  4fa7380... gsk: Change gsk_renderer_realize()
  7b62ac6... gsk: Add gsk_renderer_new_for_window()

Commits added to the branch:

  6075345... gsk: Change gsk_renderer_realize()
  14b7ed6... gsk: Add gsk_renderer_new_for_window()
  1e77f69... gskrenderer: Add GError argument to gsk_renderer_realize()