[gtk] (7 commits) Non-fast-forward update to branch gst.gl.win32

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

The branch 'gst.gl.win32' 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:

  f4ad130... media/gstreamer: Support using GL for video for Windows
  4dc5fab... gtkgstsink.c: Support EGL on Windows as well
  8ece50a... gtkgstsink.c: Fix up thinko
  075b8a9... 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

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