Issue non-success exit code on ladybug_dump_die()

If ldd(); is called the final die() call will result in a `0` return code.

This is an issue in CI environments when someone leaves a `ldd()` in the code the build server (travis, jenkins) will issue a `Build successful` as the process exited properly.

This change would change that behavior so that calling a process with a ldd statement in it results in failure of a build (or in cli scripting cases that the script isn't considered to have run successfully).

Thank you for the lib!