update qemu/mini2440 on ubuntu to support keypad

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1431 bbd45198-f89e-11dd-88c7-29a3b14d5316

tools/mount-sdcart-on-ubuntu.sh

 #!/bin/bash
+
+if [ -d /mnt/card ] 
+then
+echo "/mnt/card has been created"
+else
 sudo mkdir /mnt/card
+fi
 sudo mount -o loop,offset=32256 SDCARD /mnt/card