Add `--output-on-failure` to Travis builds.
Add `--output-on-failure` to Travis builds.

Instead of `--target all test`, only build `all` and run `ctest` with
the `--output-on-failure` option.

donmccaughey/FiendsAndFortune,donmccaughey/FiendsAndFortune,donmccaughey/FiendsAndFortune