get the root access back on android development phone ADP1

After upgrading ADP1 with 1.6 , the root access has gone.

It can be recovered with adb tool:

do adb to the phone
$adb shell
$mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
$cd /system/bin
$cat sh > su
$chmod 4755 su


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