fix(runtime/core): annotate system_abort function

Add __dead2 annotation to system_abort to signal that it never
returns. This fixes Coverity error.

Change-Id: I9f9a54705abe0a00e91d67b20b4a20f34647ff71
Signed-off-by: Mate Toth-Pal <mate.toth-pal@arm.com>
1 file changed