This ensures that an anonymous python function is able to manipulate the
BBCLASSEXTEND contents, and, therefore, amend.inc files are able to add to it.
(Bitbake rev: c7d038d404afaf4ce3735af5134163759da6f6ef)
Signed-off-by: Chris Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>