Merge branch 'category-script' into 'master'

Add script to run make targets in a recipe category

See merge request redox-os/redox!1393

scripts/category.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+if [ -z "$1" ] || [ -z "$2" ]
+then
+    echo "Build or clean all recipe directories in a category" >&2
+    echo Usage: $0 "<action>" "<recipe-category>" >&2
+    echo "<action>" can be f, r, c, u, or combinations that \"make\" understands >&2
+    exit 1
+fi
+
+set -x
+
+action="${1#-}"
+
+for recipe in `find cookbook/recipes/"$2" -name "recipe.*"`
+do
+    recipe_folder=`dirname "$recipe"`
+    recipe_name=`basename "$recipe_folder"`
+    make "$action"."$recipe_name"
+done