gdk: don't install gdkversionmacros.h twice
gdk: don't install gdkversionmacros.h twice

Since it's generated, we install the header by putting it into
gdkinclude_HEADERS, so it's wrong to put it again into
gdk_public_h_sources.
This fixes the build.

msteinert/gtk,davidgumberg/gtk,jigpu/gtk,Lyude/gtk-,Lyude/gtk-,Adamovskiy/gtk,chergert/gtk,davidgumberg/gtk,jessevdk/gtk,davidt/gtk,ahodesuka/gtk,davidgumberg/gtk,ahodesuka/gtk,ahodesuka/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,Lyude/gtk-,msteinert/gtk,bratsche/gtk-,grubersjoe/adwaita,chergert/gtk,davidgumberg/gtk,jessevdk/gtk,Distrotech/gtk2,Distrotech/gtk2,jessevdk/gtk,jigpu/gtk,Lyude/gtk-,jigpu/gtk,alexlarsson/gtk,Lyude/gtk-,alexlarsson/gtk,Adamovskiy/gtk,alexlarsson/gtk,chergert/gtk,alexlarsson/gtk,bratsche/gtk-,msteinert/gtk,Adamovskiy/gtk,davidt/gtk,jessevdk/gtk,Sidnioulz/SandboxGtk,grubersjoe/adwaita,davidgumberg/gtk,ebassi/gtk,davidgumberg/gtk,davidt/gtk,grubersjoe/adwaita,Lyude/gtk-,chergert/gtk,Distrotech/gtk2,alexlarsson/gtk,ahodesuka/gtk,Sidnioulz/SandboxGtk,ebassi/gtk,Distrotech/gtk2,bratsche/gtk-,Lyude/gtk-,davidgumberg/gtk,davidgumberg/gtk,Sidnioulz/SandboxGtk,grubersjoe/adwaita,Adamovskiy/gtk,Adamovskiy/gtk,jadahl/gtk,alexlarsson/gtk,ebassi/gtk,msteinert/gtk,bratsche/gtk-,jigpu/gtk,jadahl/gtk,ahodesuka/gtk,jadahl/gtk,bratsche/gtk-,davidt/gtk,jessevdk/gtk,chergert/gtk,grubersjoe/adwaita,jigpu/gtk,ebassi/gtk,jigpu/gtk,davidt/gtk,Sidnioulz/SandboxGtk,chergert/gtk,chergert/gtk,ahodesuka/gtk,ebassi/gtk,ahodesuka/gtk,jigpu/gtk,chergert/gtk,jigpu/gtk,Lyude/gtk-,jessevdk/gtk,Adamovskiy/gtk,Distrotech/gtk2,grubersjoe/adwaita,alexlarsson/gtk,grubersjoe/adwaita,ahodesuka/gtk,ebassi/gtk,davidt/gtk,msteinert/gtk,jadahl/gtk,jadahl/gtk,jessevdk/gtk,bratsche/gtk-,Sidnioulz/SandboxGtk,grubersjoe/adwaita,jadahl/gtk,jadahl/gtk,Adamovskiy/gtk,alexlarsson/gtk,msteinert/gtk,Adamovskiy/gtk,Distrotech/gtk2