Create helper script to output build configs

Instead of being able to export in json format for use with CI scripts,
export into a property format. This lists *single* build configurations,
and the environment variables to set for a single build of this format.

Change-Id: Ideabcdbefe6677401a4b9d60b2b623ba43b71bf8
Signed-off-by: Dean Birch <dean.birch@arm.com>
3 files changed