ARC: MWDT: LIB: implement ___errno hook

Implement ___errno so ARC MWDT libc can use proper (Zephyr) errno

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