use nested module.mk include files for test subdirectories * test/bug-35448/module.mk, test/bug-36025/module.mk, test/bug-38236/module.mk, test/bug-38691/module.mk, test/bug-44940/module.mk, test/class-concat/module.mk, test/classdef/module.mk, test/classes/module.mk, test/ctor-vs-method/module.mk, test/fcn-handle-derived-resolution/module.mk, test/nest/module.mk: New files. * test/module.mk: Include them.

%!function r = f1 ()
%!  ls = svd (1);
%!  r = eval ("ls -1;");
%!endfunction
%!function r = f2 ()
%!  [u,ls,v] = svd (1);
%!  r = eval ("ls -1;");
%!endfunction
%!function r = f3 (ls)
%!  r = eval ("ls -1;");
%!endfunction

%!test
%! ## Windows systems can't run "ls -1"
%! if (! ispc ())
%!   assert (f1 (), 0);
%!   assert (f2 (), 0);
%!   assert (ischar (f3 ()), true);
%!   assert (f3 (1), 0);
%! endif