* The install for kaldi was copying library symlinks but not the
actual library files, this makes sure to copy the libraries
* All libraries are installed to 'prefix.lib' (the original
library directory structure is no longer maintained)
* The install step for executables did not account for the different
dynamic library suffix on MacOS
- 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
Replace use of `shutil.copytree` with `copy_tree` and `install_tree` functions in `llnl.util.filesystem`.
- `copy_tree` copies without setting permissions. It should be used to copy files around in the build directory.
- `install_tree` copies files and sets permissions. It should be used to copy files into the installation directory.
- `install` and `copy` are analogous single-file functions.
- add more extensive tests for these functions
- update packages to use these functions.
* Update kaldi
always use the --fst-version otherwise it does the wrong thing with
selecting the fst version.
also enable speex by default
* Give version a more meaningful name
* Update older version with a date string instead
