增加ota文件系统编译方法；（注意每次swupdate_make_recovery_img需要删除根目录和./lichee/linux下的.config和.config.old）

target/allwinner/v851s-fastboot_sl100_back/busybox-init-base-ota-files/usr/bin/hotplug.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+# remove
+if [ "${ACTION}" == "remove" ]; then
+    MOUNTPOINT="$(grep -w "^/dev/${MDEV}" /proc/mounts | awk '{print $2}')"
+    [ -n "${MOUNTPOINT}" ] \
+        && /bin/umount -l ${MOUNTPOINT} 2>/dev/null 1>/dev/null
+    exit 0
+fi
+
+# add
+if [ "${ACTION}" == "add" ]; then
+    case ${MDEV} in
+        mmcblk[0-9])
+            [ -d "/sys/block/${MDEV}/${MDEV}p1" ] && exit 0
+            MOUNTPOINT=/mnt/SDCARD
+            ;;
+        mmcblk[0-9]p[0-9])
+            MOUNTPOINT=/mnt/SDCARD
+            ;;
+        sd[a-z])
+            [ -d "/sys/block/${MDEV}/${MDEV}1" ] && exit 0
+            MOUNTPOINT=/mnt/exUDISK
+            ;;
+        sd[a-z][0-9])
+            MOUNTPOINT=/mnt/exUDISK
+            ;;
+        *)
+            exit 0
+            ;;
+    esac
+    for fstype in vfat ext4
+    do
+        [ "${fstype}" = "ext4" -a -x "/usr/sbin/e2fsck" ] \
+            && e2fsck -p /dev/${MDEV} >/dev/null
+        /bin/mount -t ${fstype} -o utf8 /dev/${MDEV} ${MOUNTPOINT} && exit 0
+    done
+    [ ! -b "/dev/${MDEV}" -a -f "/sys/block/${MDEV%p*}/${MDEV}/uevent" ] \
+        && echo add > /sys/block/${MDEV%p*}/${MDEV}/uevent
+fi
+exit 0