[gtk/matthiasc/for-master] gtk-demo: Group the OpenGL demos

[Matthias Clasen <matthiasc src gnome org>]

commit 638508fa204e6f1e62b59e2ce6be76e45c54ca1d
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Apr 12 21:58:07 2020 -0400

    gtk-demo: Group the OpenGL demos

 demos/gtk-demo/gears.c  | 2 +-
 demos/gtk-demo/glarea.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/demos/gtk-demo/gears.c b/demos/gtk-demo/gears.c
index 3be4aa352b..b1f58e8840 100644
--- a/demos/gtk-demo/gears.c
+++ b/demos/gtk-demo/gears.c
@@ -1,4 +1,4 @@
-/* Gears
+/* OpenGL/Gears
  *
  * This is a classic OpenGL demo, running in a GtkGLArea.
  */
diff --git a/demos/gtk-demo/glarea.c b/demos/gtk-demo/glarea.c
index 653900d057..a72cf7c376 100644
--- a/demos/gtk-demo/glarea.c
+++ b/demos/gtk-demo/glarea.c
@@ -1,4 +1,4 @@
-/* OpenGL Area
+/* OpenGL/OpenGL Area
  *
  * GtkGLArea is a widget that allows custom drawing using OpenGL calls.
  */