contrib/wix/defines.wxi

test-revert: add methodical revert to "base" with explicit file path

We now also test reverting file to another revision's content. However
this differs from previously introduced test by using the explicit path
of each "case file" when calling revert. This should result in the
same result regarding file content and backup creation, but the output
of the `hg revert` call should differ.

<Include>

  <?if $(var.Platform) = "x64" ?>
    <?define IsX64 = yes ?>
  <?else?>
    <?define IsX64 = no ?>
  <?endif?>

</Include>