message: Same for ex9p.
diff: // mpirun -np 4 ex9p -pa -m ../data/periodic-cube.mesh -d cuda
  // mpirun -np 4 ex9p -ea -m ../data/periodic-cube.mesh -d cuda
  // mpirun -np 4 ex9p -fa -m ../data/periodic-cube.mesh -d cuda
  -// mpirun -np 4 ex9p -pa -m ../data/fichera-amr.mesh -dt 0.0001 -tf 0.01 -d cuda
  +// mpirun -np 4 ex9p -pa -m ../data/amr-quad.mesh -p 1 -rp 1 -dt 0.002 -tf 9 -d cuda
  //
  // Description: This example code solves the time-dependent advection equation
  // du/dt + v.grad(u) = 0, where v is a given fluid velocity, and
  