- remove the old LGPL license headers from all files in Spack
- add SPDX headers to all files
- core and most packages are (Apache-2.0 OR MIT)
- a very small number of remaining packages are LGPL-2.1-only
This is a simple package that drops their shell wrapper into
prefix.bin and their jar files into prefix.lib.
The approach comes from the picard package.
