This recipe needs to generate the latest hashes. With unihash we may not
rebuild as previous dependencies may be marked as equivalent.
eSDK which uses this is nostamp already, mark this task as nostamp also
for the same reason.
(From OE-Core rev: e8cfc8525c5d903ee876eafd56521f4a7325a6f5)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>