ARC: MWDT: workaround missing file IO related defines

ARC MWDT libc misses some file IO related defines, let's
add them in ARC MWDT libc compatibility layer.

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