[gtk] (7 commits) Non-fast-forward update to branch wip/otte/gl-hdr

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/gl-hdr' 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:

  423c98a... egl: Move initialization code and port Wayland
  533d630... x11: Port to shared EGL code
  87ade85... glcontext: The content cannot be the current context
  9c31c4d... surface: Add a private struct
  30b2a5f... display: Get carried away by extension checker
  b4d446c... egl: Move EGLSurface handling to GdkSurface
  915dea6... build: Add a HAVE_EGL define to config.h
  0706572... xxx surface
  a7852ca... xxx display

Commits added to the branch:

  4dd0212... build: Add a HAVE_EGL define to config.h
  0e3a34e... egl: Move initialization code and port Wayland
  dab73ee... x11: Port to shared EGL code
  b6fb791... glcontext: The content cannot be the current context
  68ede7b... surface: Add a private struct
  000d842... display: Get carried away by extension checker
  802ac69... egl: Move EGLSurface handling to GdkSurface