Build: Add tf-m-extras examples to build configs

- The examples also need extra_params remapping to use custom
build flags.

- Multiple examples use the freertos kernel so it should be cloned.

- The extra_params could contain paths that uses "codebase_root_dir".
  These also need to be substituted in the final build command.

Change-Id: I4d4f67a6f23e3eab193e265a9414f3b941f70d67
Signed-off-by: Bence Balogh <bence.balogh@arm.com>
5 files changed