py/objtype: type_attr: Fall back to lookup attr in "object".
py/objtype: type_attr: Fall back to lookup attr in "object".

Because mp_obj_class_lookup() doesn't do that by default, unless asked
explicitly (i.e. called with &mp_type_object as type to look up in).

This is similar to handling done in super_attr().

Change-Id: I2ade37f95128cc867f1c346b0b39da336c438dbb
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython