[gtk] (9 commits) Non-fast-forward update to branch wip.win32.fixes

[Chun-wei Fan <fanchunwei src gnome org>]

The branch 'wip.win32.fixes' 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:

  1b0e901... demos/gtk-demo|widget-factory: Temporarily disable gui_app 
  6661c05... media/gstreamer: Support using GL for video for Windows
  468295a... gtkgstsink.c: Support EGL on Windows as well
  b4506af... gtkgstsink.c: Fix up thinko
  da056ae... gtkgstsink.c: Avoid g_setenv()

Commits added to the branch:

  12a9a0f... gtkgstmediafile: Remove media-info-updated callback (*)
  7db87a8... Merge branch 'fix-gst-media-file' into 'master' (*)
  16c7627... media/gstreamer: Support using GL for video for Windows (*)
  5206c98... gtkgstsink.c: Support EGL on Windows as well (*)
  01e3822... gtkgstsink.c: Fix up thinko (*)
  9444af6... gtkgstsink.c: Avoid g_setenv() (*)
  3e2b41f... gtkgstsink.c: Win32: Limit GL API to gles2 when using EGL (*)
  30ac0cd... gstglsink.c: Some cleanups (*)
  0bf984b... demos/gtk-demo|widget-factory: Temporarily disable gui_app 

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