create a module for round-robin

pkgs/s6-rc-round-robin/default.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   propagatedBuildInputs = [ s6-rc-up-tree ];
   installPhase = ''
     mkdir -p $out/bin
-    cp -p ${writeFennel "uevent-watch" {
+    cp -p ${writeFennel "s6-rc-round-robin" {
       packages = [fennel anoia linotify lualinux s6-rc-up-tree] ;
       mainFunction = "run";
     } ./robin.fnl} $out/bin/s6-rc-round-robin