put liminix-tools in package overlay

pkgs/liminix-tools/builder.sh

@@ -0,0 +1,18 @@
+source $stdenv/setup
+mkdir -p $out/${name}
+echo $type > $out/${name}/type
+mkdir -p $out/${name}/dependencies.d
+echo $buildInputs > $out/buildInputs
+test -n "$dependencies" && for d in $dependencies; do
+    touch $out/${name}/dependencies.d/$d
+done
+test -n "$contents" && for d in $contents; do
+    mkdir -p $out/${name}/contents.d
+    touch $out/${name}/contents.d/$d
+done
+test -n "$run" && (echo -e "#!$shell\n$run" > $out/${name}/run)
+test -n "$up" && (echo -e "#!$shell\n$up" > $out/${name}/up)
+test -n "$down" && (echo -e "#!$shell\n$down" > $out/${name}/down)
+for i in $out/${name}/{down,up,run} ; do test -f $i && chmod +x $i; done
+true
+# (echo  $out/${name} && cd $out/${name} && find . -ls)