parse: pass filename, lineno into the ast

parse: pass filename, lineno into the ast

We will be needing this information to improve the tracebacks of python code
from the metadata, as well as to give the user information about where
variables were defined, so they know how it ended up the way it is.

(Bitbake rev: 9615c538b894f71a2d1a0ba6b3f260db91e75786)

Signed-off-by: Chris Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>