fix multi usb device check

swap/swap/swap/swap.sh

@@ -16,7 +16,7 @@ check_usb_status(){
 	# 3	成功检测到ext？格式磁盘,可以创建swap
 	# 4	swap分区已经加载
 
-	ext_type=`/bin/mount | grep -E 'mnt' | sed -n 1p | cut -d" " -f5`
+	ext_type=`/bin/mount | grep -E 'mnt' | cut -d" " -f5 | grep -Eo "ext2|ext3|ext4"`
 	usb_disk=`/bin/mount | grep -E 'mnt' | sed -n 1p | cut -d" " -f3`
 	swapon=`free | grep Swap | awk '{print $2}'`
 	dbus set swap_usb_type="$ext_type"