[gtk] (5 commits) Non-fast-forward update to branch wip/otte/gdk-headers

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/gdk-headers' 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:

  0b9afed... macos: Don't include gdkinternals.h
  68ef541... x11: Don't include gdkinternals.h
  902c148... win32: Fix gcc warnings
  88ffdd7... wayland: Don't include gdkinternals.h
  927eab9... gdk: Remove gdkinternals.h

Commits added to the branch:

  f85202e... macos: Don't include gdkinternals.h
  0ce7e1b... x11: Don't include gdkinternals.h
  61a01a3... win32: Fix gcc warnings
  3dff98d... wayland: Don't include gdkinternals.h
  44205e8... gdk: Remove gdkinternals.h