510907f21f941d0a0b67204c63947fce14afacef build system: add Makefile.am to EXTRA_DIST

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 199 | PASS: 198 | FAIL: 0 | XFAIL: 1 | XPASS: 0

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 197 | PASS: 196 | FAIL: 0 | XFAIL: 1 | XPASS: 0

A full log can be found on karaba in '/tmp/dynare-master-check-f01tWTzDBi.log'.