update __package_luarocks to new style state checking

Signed-off-by: Nico Schottelius <nico@brief.schottelius.org>

conf/type/__package_luarocks/gencode-remote

@@ -49,18 +49,15 @@ else
     state_is="absent"
 fi
 
-case "$state" in
-   installed)
-      # Install only if non-existent
-      if [ -z "$is_installed" ]; then
+# Leave if nothing is to be done
+[ "$state_is" = "$state_should" ] && exit 0
+
+case "$state_should" in
+    present)
         echo luarocks install \"$name\"
-      fi
     ;;
-   removed)
-      # Remove only if existent
-      if [ -n "$is_installed" ]; then
+    absent)
         echo luarocks remove \"$name\"
-      fi
     ;;
     *)
         echo "Unknown state: $state" >&2