convert system.img to block base and zip

#!/bin/bash

rom_fp="$(date +%y%m%d)"
mkdir -p release/$rom_fp/

git clone https://github.com/aclegg2011/img2sdat.git
cp system.img img2sdat
cd img2sdat
./img2sdat.py system.img -o tmp -v 4
cd ..
cp img2sdat/tmp/* twrp_flashables/arm64a
cd twrp_flashables/arm64a
7za a -tzip arm64a.zip *
cp arm64a.zip ~/Android/bliss-los/release/$rom_fp/arm64a.zip
rm -rfv img2sdat