Switch path to source-path for auto directive
Switch path to source-path for auto directive

To avoid confusion with the behaviour of path in the other directives.

AnthonyTruchet/breathe,RR2DO2/breathe,AnthonyTruchet/breathe,AnthonyTruchet/breathe,kirbyfan64/breathe,kirbyfan64/breathe,kirbyfan64/breathe,AnthonyTruchet/breathe,kirbyfan64/breathe,RR2DO2/breathe