Compatibility fix: strsplit was introduced in MATLAB R2013a

Provide alternative implementations, taken from Dynare.
3 jobs for master in 1 minute and 34 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #6468
testsuite_matlab

00:00:54

failed #6470
allowed to fail
testsuite_octave

00:01:33

failed #6469
allowed to fail
testsuite_old_matlab

00:00:48

 
Name Stage Failure
failed
testsuite_octave Test
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printoption.m                                      Unit test number  1  PASS    [   0.023025 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 1 PASS [ 0.00920296 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 2 PASS [ 0.00814104 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 3 PASS [ 0.00747013 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printstart.m Unit test number 1 PASS [ 0.00612187 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/setdefaultmember.m Unit test number 1 PASS [ 0.00369096 ]

make: *** [Makefile:10: check-octave] Error 1
ERROR: Job failed: exit status 1
failed
testsuite_old_matlab Test
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printoption.m                                      Unit test number  1  PASS    [ 0.010411 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 1 PASS [ 0.004478 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 2 PASS [ 0.002685 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 3 PASS [ 0.002579 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printstart.m Unit test number 1 PASS [ 0.002048 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/setdefaultmember.m Unit test number 1 PASS [ 0.0023 ]

make: *** [Makefile:14: check-matlab] Error 1
ERROR: Job failed: exit status 1