ci(detect_arch_feat): add feature detection test

This patch adds a test config, to explicitly validate the architectural
feature detection mechanism, which is disabled by default.

Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Change-Id: I3eb5bab46bb93a4d0c746a1e1c5bb764db19c7f3
3 files changed