Check that DrawText() results in the expected output.
Currently the tests are disabled for non-Windows systems because of the
problem with the reference file paths there.
See #16261.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76556 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
