* po/README: Move language fetcing to ...

* linguas.sh: ... here.
	* po/README: Point to linguas.sh.

linguas.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+rsync -Lrtvz --exclude=ko.po  translationproject.org::tp/latest/grub/ po
+
+(
+    (
+	cd po && ls *.po| cut -d. -f1
+	echo "en@quot"
+	echo "en@hebrew"
+	echo "de@hebrew"
+	echo "en@cyrillic"
+	echo "en@greek"
+	echo "en@arabic"
+	echo "en@piglatin"
+	echo "de_CH"
+    ) | sort | uniq | xargs
+) >po/LINGUAS