new test failures

[John W. Eaton]

I'm seeing these failures now.  They seem to all be related to the
sparse_auto_mutate change.

  Integrated test scripts:

    src/DLD-FUNCTIONS/luinc.cc ....................... PASS    0/2    FAIL 2
    src/DLD-FUNCTIONS/spkron.cc ...................... PASS    0/2    FAIL 2
    src/DLD-FUNCTIONS/spqr.cc ........................ PASS    8/14   FAIL 6
    scripts/general/accumarray.m ..................... PASS   10/11   FAIL 1
    scripts/general/repmat.m ......................... PASS   15/16   FAIL 1
    scripts/sparse/speye.m ........................... PASS    1/5    FAIL 4
    scripts/sparse/spfun.m ........................... PASS    0/4    FAIL 4
    scripts/sparse/spones.m .......................... PASS    1/3    FAIL 2
    scripts/sparse/spstats.m ......................... PASS    0/1    FAIL 1
    scripts/statistics/base/mode.m ................... PASS    2/3    FAIL 1

  Fixed test scripts:

    test_sparse.m .................................... PASS  468/1176 FAIL 708
    test_io.m ........................................ PASS   65/66   FAIL 1
    test_range.m ..................................... PASS   25/29   FAIL 4

  Summary:

    PASS   3032
    FAIL    737


Is there a simple fix that leaves auto mutation off and still allows
the tests to pass, or do we need to fix all these tests?

jwe