Use the nettle testsuite as ptests. Skip "sha1-huge-test" because
it can take 20 minutes to finish.
(From OE-Core rev: 75839c401f319d4367cb1b9259d0931170212ec8)
Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>