Fix the build
Fix the build

gtkx.h can no longer be included internally, so skip it when
generating the gir. We include the individual headers anyway.

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