overlay/sway: latest git -> 1.9

- https://aur.archlinux.org/packages/sway-git#comment-952005
  I am too lazy (and stupid) to fix it.

overlays/default.nix

@@ -6,5 +6,5 @@ let
 in {
   nautilus = import ./nautilus.nix {inherit addPatches;};
   prismlauncher = import ./prismlauncher.nix {inherit addPatches;};
-  sway = import ./sway/git;
+  sway = import ./sway/1.9 {inherit addPatches;};
 }