CI: Enable Branch Protection in FVP model

This patch enables BTI support for FVP by adding
'has_branch_target_exception=1' model parameter,
which is set to 0 by default.
CI test builds with enabled PAuth/BTI now use
added 'fvp-aemv8a.8_5+bti' and 'fvp-aemva.8_6+bti'
run configurations.

Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Change-Id: I51cc043b6ed76a860a916428d5c8959bfa70f1a4
45 files changed