PixelOS build_scripts for davinci

Usage:

# create a folder to hold source code
mkdir PixelOS
cd PixelOS

# clone build_scripts into aosp
git clone https://github.com/Twel12/build_script_Delta.git build_scripts

# run build scripts
bash build_scripts/server.sh

Links:

# device
https://github.com/Twel12/device-xiaomi-davinci

# kernel
https://github.com/Twel12/android_kernel_xiaomi_sm6150

# vendor
https://github.com/Twel12/proprietary_vendor_xiaomi_davinci