test: ARC: skip div-by-zero test in case of SW div implementation

The SW div implementation from libgcc doesn't handle division by
zero case, so the HW exception isn't triggered.

So, skip this test case (as we are already doing for some other
ARC targets).

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Evgeniy Paltsev <PaltsevEvgeniy@gmail.com>