Without this you get a rather odd traceback instead of the proper
exception message.
(Bitbake rev: 2fe1826d3077eeda6cde433d3a1e6620f74e08dd)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>