fix: imgrepacker bug 打包路径总是有问题

pack-ci.sh

@@ -401,7 +401,9 @@ pack_image() {
         echo "Allwinner PhoenixSute Image Format Detected.."
         __pack_super_img "$ALLWINNER_DEFAULT_SYSTEM_PARTITION_NAME"
         sleep 5
-        imgrepacker "$update_img_tmp_dir/update.img.dump"
+        pushd "$update_img_tmp_dir"
+        imgrepacker ./update.img.dump
+        popd
         mv "$update_img_tmp_dir/update.img" "$outfile_path"
     elif [[ "$is_rockchip" == "1" ]]
     then