ci(rng-trap): added build and run conf for tests

Config settings for TF-A and TFTF have been added as well as run
configs. This will perform the test created for FEAT_RNG_TRAP and
will expect an EL3 exception to be triggered, which will generate
a system panic, since no handler is set for such exception.

Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
Change-Id: Ic86a1f187004312c6778641d0967ffaa99e945c0
8 files changed