message: Add MFEM_USE_SUPERLU5 to the list of variables that will be
  written to config.hpp and config.mk.
  Also print MFEM_USE_SUPERLU5 when running 'make info'.
diff: @@ -339,6 +339,7 @@ MFEM_DEFINES = MFEM_VERSION MFEM_VERSION_STRING MFEM_GIT_STRING MFEM_USE_MPI\
  MFEM_USE_LIBUNWIND MFEM_USE_LAPACK MFEM_THREAD_SAFE MFEM_USE_OPENMP\
  MFEM_USE_LEGACY_OPENMP MFEM_USE_MEMALLOC MFEM_TIMER_TYPE MFEM_USE_SUNDIALS\
  MFEM_USE_MESQUITE MFEM_USE_SUITESPARSE MFEM_USE_GINKGO MFEM_USE_SUPERLU\
  + MFEM_USE_SUPERLU5\
  MFEM_USE_STRUMPACK MFEM_USE_GNUTLS MFEM_USE_NETCDF MFEM_USE_PETSC\
  MFEM_USE_SLEPC MFEM_USE_MPFR MFEM_USE_SIDRE MFEM_USE_FMS MFEM_USE_CONDUIT\
  MFEM_USE_PUMI MFEM_USE_HIOP MFEM_USE_GSLIB MFEM_USE_CUDA MFEM_USE_HIP\
  @@ -676,6 +677,7 @@ status info:
  $(info MFEM_USE_MESQUITE = $(MFEM_USE_MESQUITE))
  $(info MFEM_USE_SUITESPARSE = $(MFEM_USE_SUITESPARSE))
  $(info MFEM_USE_SUPERLU = $(MFEM_USE_SUPERLU))
  + $(info MFEM_USE_SUPERLU5 = $(MFEM_USE_SUPERLU5))
  $(info MFEM_USE_MUMPS = $(MFEM_USE_MUMPS))
  $(info MFEM_USE_STRUMPACK = $(MFEM_USE_STRUMPACK))
  $(info MFEM_USE_GINKGO = $(MFEM_USE_GINKGO))
  