gdkgl should use shader version 1.50
gdkgl should use shader version 1.50

Using version 1.20 with a forward compatible 3.2 core context is incorrect
since OpenGL 3.2 deprecates shader version 1.20 (See section E.2). The latest
fglrx drivers will not compile these shaders.

https://bugzilla.gnome.org/show_bug.cgi?id=744203

davidgumberg/gtk,ahodesuka/gtk,ahodesuka/gtk,Lyude/gtk-,chergert/gtk,grubersjoe/adwaita,jigpu/gtk,Lyude/gtk-,Adamovskiy/gtk,jadahl/gtk,alexlarsson/gtk,Lyude/gtk-,alexlarsson/gtk,grubersjoe/adwaita,davidgumberg/gtk,alexlarsson/gtk,chergert/gtk,ahodesuka/gtk,jigpu/gtk,grubersjoe/adwaita,Lyude/gtk-,chergert/gtk,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,chergert/gtk,jigpu/gtk,ahodesuka/gtk,alexlarsson/gtk,Adamovskiy/gtk,Adamovskiy/gtk,grubersjoe/adwaita,chergert/gtk,davidgumberg/gtk,jadahl/gtk,ahodesuka/gtk,Lyude/gtk-,jadahl/gtk,jadahl/gtk,jigpu/gtk,alexlarsson/gtk,alexlarsson/gtk,davidgumberg/gtk,alexlarsson/gtk,chergert/gtk,Lyude/gtk-,davidgumberg/gtk,Adamovskiy/gtk,Lyude/gtk-,davidgumberg/gtk,Lyude/gtk-,jigpu/gtk,ahodesuka/gtk,jigpu/gtk,chergert/gtk,ahodesuka/gtk,Adamovskiy/gtk,grubersjoe/adwaita,davidgumberg/gtk,Adamovskiy/gtk,jigpu/gtk,jadahl/gtk,jadahl/gtk,jadahl/gtk,chergert/gtk,Adamovskiy/gtk,jadahl/gtk,Adamovskiy/gtk,davidgumberg/gtk,ahodesuka/gtk,jigpu/gtk,alexlarsson/gtk