The change "Add Mynewt target builds to CI" changes the format of the
.travis.yml file a bit. Fix up the ptest utility so that it is still
able to run the simulator tests.
Signed-off-by: David Brown <david.brown@linaro.org>
The travis config allows multiple tests to run in parallel. Run a small
program that does the same thing.
Signed-off-by: David Brown <david.brown@linaro.org>