Add noobs export stage

export-noobs/00-release/files/partition_setup.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+set -ex
+
+if [ -z "$part1" ] || [ -z "$part2" ]; then
+  printf "Error: missing environment variable part1 or part2\n" 1>&2
+  exit 1
+fi
+
+mkdir -p /tmp/1 /tmp/2
+
+mount "$part1" /tmp/1
+mount "$part2" /tmp/2
+
+sed /tmp/1/cmdline.txt -i -e "s|root=/dev/[^ ]*|root=${part2}|"
+sed /tmp/2/etc/fstab -i -e "s|^.* / |${part2}  / |"
+sed /tmp/2/etc/fstab -i -e "s|^.* /boot |${part1}  /boot |"
+
+if ! grep -q resize /proc/cmdline; then
+  sed -i 's/ quiet init=.*$//' /tmp/1/cmdline.txt
+fi
+
+umount /tmp/1
+umount /tmp/2