So libobj/ wasn't included in the tarball, and nor was the compatability
functions being added to the driver when they were needed. The oddity is
that using the ./configure script (and thus make distcheck) succeeds. It
was only when 'autoreconf -fi' was run was the first error encoutered.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reported-by: Tobias Klausmann