[OE-core] [PATCH 28/33] python-pycairo: fix installation path of __init__.py

[Kamble, Nitin A]

> >  # cairo >= 1.8.8
> >  DEPENDS = "cairo"
> > -PR = "ml0"
> > +PR = "r1"
> 
> any reason not to use mlX

The r1 kind of notation makes it consistent with rest of the recipes.

Thanks,
Nitin