It seems the frozenset constructor in pypy runs len(), so we can't pass the
DataSmart instance directly to it, instead pass the iterator. Fixes pypy
support.
(Bitbake rev: b492836e08745e04bd9ba2fb0b56a680a5fdce79)
Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>