netlib-scalapack: specify MPI's location for Fujitsu-MPI. (#16798)

Fujitsu-MPI wrapper commands aren't recognized from 'FindMPI' 
function of 'cmake'. If we are using the Fujitsu compiler and Fujitsu MPI, 
specify the MPI path information explicitly.

var/spack/repos/builtin/packages/netlib-scalapack/package.py

@@ -82,6 +82,15 @@ def cmake_args(self):
                 "-DCMAKE_Fortran_FLAGS=%s" % self.compiler.fc_pic_flag
             ])
 
+        # Specify Fujitsu-MPI's location
+        if spec.satisfies('%fj') and '^fujitsu-mpi' in spec:
+            options.extend([
+                '-DMPI_C_COMPILER=%s'       % spec['mpi'].mpicc,
+                '-DMPI_CXX_COMPILER=%s'     % spec['mpi'].mpicxx,
+                '-DMPI_Fortran_COMPILER=%s' % spec['mpi'].mpifc,
+                '-DMPI_BASE_DIR=%s' % spec['mpi'].prefix
+            ])
+
         return options
 
     @run_after('install')