Its not immediately obvious to the user that a logfile exists for a failed setscene
task. Add code to knotty to display where that logfile is in those cases.
[YOCTO #6055]
(Bitbake rev: 0664fa15597785dd90cf205531a9801e6da6ba47)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>