strace: Disable failing test

This test is failing for uncertain reasons. We have reported upstream, disable
it until we can work out why this happened. The point it started failing is
unclear due to other test framework issues.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 2e9165a8)
Signed-off-by: Steve Sakoman <steve@sakoman.com>