package-auto-deps/python: python-core provides __builtin__

Signed-off-by: Christopher Larson <kergoth@gmail.com>
pythondeps: handle implicit relative package import

Signed-off-by: Christopher Larson <kergoth@gmail.com>
python-numpy: exclude 'compat' python dep

Signed-off-by: Christopher Larson <kergoth@gmail.com>