Also added the default json file name as default for
the first positional argument.
(From OE-Core rev: 3cfad28dfa9ef3d142f12d7d181ee70ee1559dc4)
Signed-off-by: Lucian Musat <george.l.musat@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>