Wine translation for ast locale

[Alex Henrie]

In addition to adding ast.po to the repository, your patch will have
to add ast.po to po/Makefile.in.

Also, please change the comment at the top of the PO file to match the
comments in the existing Wine PO files, and put your name in gettext's
Last-Translator header the same as in Git's Signed-off-by header.

You might have to create dlls/kernel32/nls/ast.nls for your
translations to appear in Wine programs. Please compile Wine and
double-check that your translation looks correct in practice before
sending the patch.

-Alex