[bug #68033] mkoctfile does not work using version 11.0.92 on Windows 11

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Follow-up Comment #12, bug #68033 (group octave):

One of the new tests is failing when testing cross-compiled Octave (using
qemu):

>>>>> processing
>>>>> /home/runner/work/octave/octave/.build/libinterp/corefcn/toplev.cc-tst
***** test <*68033>
 [status, output] = system (sprintf ('"%s" "--version" 2>&1 1>%s', ...
                                     octave_exe_path, nul_device));
 assert (status, 0);
 assert (ischar (output));
 assert (isempty (output));
!!!!! regression: https://octave.org/testfailure/?68033
assert (isempty (output)) failed
shared variables 
    octave_exe_path = /home/runner/work/octave/octave/.build/src/octave
    nul_device = /dev/null


Apparently, redirecting output doesn't work as expected. Another new test lead
to the following output during `make check`:

  libinterp/corefcn/toplev.cc-tst ................................octave: X11
DISPLAY environment variable not set
octave: disabling GUI features
octave: X11 DISPLAY environment variable not set
octave: disabling GUI features
 pass   12/13   [ 0.056s |  0.255s]



Given that this is on Linux and the actual changes from this report only
affect Windows, this is very likely not new. It is just revealed by the new
tests.

Should we do something about that? (My best guess is that this has something
to do with running executables through qemu-user-binfmt.)
Preferably, we could just skip those two tests when running with emulation.


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