Reorder order of directories: in debug mode, these are the files with

Reorder order of directories: in debug mode, these are the files with
the longest compute time:

0m13s lac/chunk_sparse_matrix.cc
0m14s numerics/derivative_approximation.cc
0m15s dofs/dof_renumbering.cc
0m15s fe/fe_tools.cc
0m15s numerics/mesh_worker_vector_selector.cc
0m16s grid/grid_tools.cc
0m16s numerics/error_estimator.cc
0m17s grid/tria.cc
0m21s numerics/solution_transfer.cc
0m23s dofs/dof_accessor.cc
0m28s lac/sparse_matrix.cc
0m31s dofs/dof_tools.cc
0m40s numerics/vectors.cc
0m52s fe/fe_values.cc
1m14s numerics/data_out.cc

In optimized mode it is this way:
0.27s dofs/dof_renumbering.cc
0.27s lac/precondition_block.cc
0.28s numerics/derivative_approximation.cc
0.28s numerics/mesh_worker_vector_selector.cc
0.32s base/data_out_base.cc
0.33s numerics/fe_field_function.cc
0.37s lac/chunk_sparse_matrix.cc
0.38s grid/tria.cc
0.45s lac/sparse_matrix.cc
0.49s numerics/error_estimator.cc
0.57s dofs/dof_accessor.cc
1.19s dofs/dof_tools.cc
1.28s numerics/data_out.cc
2.55s fe/fe_values.cc
3.31s numerics/vectors.cc

git-svn-id: https://svn.dealii.org/trunk@22854 0785d39b-7218-0410-832d-ea1e28bc413d