[gtk] (6 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:

  b2e9032... win32: Don't include gdkinternals.h
  259baa7... macos: Don't include gdkinternals.h
  4ba93cd... x11: Don't include gdkinternals.h
  c742416... win32: Fix gcc warnings
  4b90586... wayland: Don't include gdkinternals.h
  eaf2358... gdk: Remove gdkinternals.h

Commits added to the branch:

  226ecaf... win32: Don't include gdkinternals.h
  4e83649... macos: Don't include gdkinternals.h
  47e0539... x11: Don't include gdkinternals.h
  d4f9d38... win32: Fix gcc warnings
  279f9aa... wayland: Don't include gdkinternals.h
  a294745... gdk: Remove gdkinternals.h