build: build trusted applications
This adds a script to build trusted applications.
This was copied from [1] based on sha-1: 7957a2ca265402b5ccdfa69f6a80d99732dbbe7e
[1] https://gitlab.com/mediatek/aiot/bsp/build-bootloaders
Signed-off-by: Julien Masson jmasson@baylibre.com Signed-off-by: Safae Ouajih souajih@baylibre.com