78d28848fac72292b31b81b056af0aa5c518cbf7 Add the GPL text (cherry picked from commit f086359a9c6cc2729a0d668fd9be0d33354e6cff)

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 423 | PASS: 421 | FAIL: 0 | XFAIL: 2 | XPASS: 0

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 421 | PASS: 419 | FAIL: 0 | XFAIL: 2 | XPASS: 0

A full log can be found on karaba in '/tmp/dynare-4.4-check-y4Ehgq2shO.log'.