add_aur.sh can now add multiple packages

add_aur.sh

@@ -1,8 +1,11 @@
 #!/bin/zsh
+while [ ! -z "$1" ] ; do
     pkg="$1"
     if [ -d "packages/${pkg}" ] ; then
         echo "Packet ${pkg} existiert bereits"
-    exit 1
-fi
+    else
         git submodule add "https://aur.archlinux.org/${pkg}.git" "packages/${pkg}"
+    fi
     ./build_pkg.sh "$pkg"
+    shift
+done