Build: Add extra_params to support ST specific configs

ST requires to cover some specific configs on Open CI.
To make tfm_build_manager more flexible to support different configs,
add 'extra_params' which can be mapped to any specific configs.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ia64e002695c19056ee215919564c6493e1a152fd
2 files changed