This is needed by the copyleft_compliance class, so it can emit series files
for the patches, which greatly increases their usefulness to a user trying to
reconstruct the sources outside of OE.
(From OE-Core rev: 290c7239c21e477bb78b88d92a5b8a7de9142310)
Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>