Add d8.bat for Windows build tools

This CL adds d8.bat, that is based
on dx.bat. Build tools for windows
will ship this script.

BUG: 79868053
Test: make -j PRODUCT-sdk_phone_armv7-win_sdk showcommands sdk_repo
Test: make -j PRODUCT-sdk_arm64-sdk showcommands sdk_repo
(cherry picked from commit 69befeb727268e13a3e28edd2724327ae155d39d)

Change-Id: Idce6ae0f9b2f749e6a4ad8c507eb1e90c5668ce8
Merged-In: Idce6ae0f9b2f749e6a4ad8c507eb1e90c5668ce8
1 file changed