py3: use pycompat.bytestr() to convert str into bytes
the keys of opts are str here, so we have to convert it to bytes before passing
into error.Abort()
Differential Revision: https://phab.mercurial-scm.org/D3617
<Include>
<?if $(var.Platform) = "x64" ?>
<?define IsX64 = yes ?>
<?else?>
<?define IsX64 = no ?>
<?endif?>
</Include>