If the deferred task deadlock avoidance code triggers, it could mark an executed
task as failed which leads to "covered and not covered" error messages. Improve
the logic so if the deadlock code is triggered, it doesn't cause the errors.
(Bitbake rev: 51bdd6cb3bd9e2c02e261fb578bb945b86b82c75)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>