kunit: tools: fix kunit_tool tests for parsing test plans

Some tests logs for kunit_tool tests are missing their test plans
causing their tests to fail; fix this by adding the test plans.

Fixes: 45dcbb6f ("kunit: test: add test plan to KUnit TAP format")
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>