Stage Three - Manifest:

    * As we do_rootfs we should:
          o Check to see if the package has an SPDX meta-data file.
                + If it does, use it.
                + If it doesn't, generate one but mark it as automatically generated and not an official spdx file. 
          o Gather up spdx files into a work dir 
    * Once the image is finished gather up all the spdx licenses and create an spdx manifest for the image
    * Once the image is finished gather up all the spdx licenses and create a raw text manifest for the image