SoC common: scripts: Add prepare_toolchain.sh [1/1]

PD#SWPL-67525

Problem:
Add prepare_toolchain.sh.

Solution:
move toolchain preparation from Makefile to scripts/prepare_toolchain.sh.

Verify:
ad401_a113l

Change-Id: Ib341f6d809d0ce165065710c43d0b9d9696c6457
Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
1 file changed