contrib/wix/defines.wxi

lock: add a trylock method handling the timeout and messaging logic

We are about to make the messages around lock more flexible. We move all the
currently logic into a function in the lock module. We'll update the message
scheme in the next changeset.

<Include>

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

</Include>