Add `manual_download = True` to packages that need to do manual
downloads but do not have the `manual_download attribute set. This
provides a message when installing these packages rather than a generic
fetch error.
- [x] add `concretize.lp`, `spack.yaml`, etc. to licensed files
- [x] update all licensed files to say 2013-2021 using
`spack license update-copyright-year`
- [x] appease mypy with some additions to package.py that needed
for oneapi.py
* ffr: add flag to use fixed format in which the length of one line of the source code is 255 when building with Fujitsu compiler.
* ffr: changed to elif.
