600715127c3235dd35c9ec5be322c0e41ea34928 build system: changes for #862 broke preprocessor parallel build

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 512 | PASS: 506 | FAIL: 3 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * analytic_derivatives/fs2000_analytic_derivation.mod | * simul/simul_ZLB_purely_forward_no_solution.mod | * kalman_filter_smoother/fs2000_smoother_only.mod

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 506 | PASS: 496 | FAIL: 7 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * initval_file/ramst_initval_file.mod | * analytic_derivatives/fs2000_analytic_derivation.mod | * simul/simul_ZLB_purely_forward_no_solution.mod | * kalman_filter_smoother/fs2000_smoother_only.mod | * run_reporting_test_octave.m | * ../matlab/lyapunov_symm.m#1 | * ../matlab/utilities/general/name2tex.m#4

A full log can be found on karaba in '/tmp/dynare-master-check-8kpViyHauW.log'.