Add package for FLCL (#19252)
Add package for FLCL (#19252)

* Initial cut at FLCL spackage. Works with GCC so far.

* Update spackage to list release which supports spack. Add @agaspar as a maintainer. Default unit tests to disabled when building with spack.

* Change url to 0.2.

* Nope, 0.3.
iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack