ArmVirtPkg: Enable stack guard
Enable the stack guard in ArmVirtPkg builds, so that stack overflows are
caught as they occur, rather than when they happen to hit a read-only
memory region.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>