Why I did it
Update Makefile, so it does the following:
For a given platform, verify if platform/checkout/.ini exists and hence run the platform/checkout/template.j2. This allows platform code to be checked out during the 'make configure' stage.
How I did it
git clone git@github.com:Azure/sonic-buildimage.git
mkdir platform/cisco-8000
make init
make configure PLATFORM=cisco-8000
make all
