smart for Fedora 11

[Anders F Björklund]

>>
>> Fedora 11 has changed their RPM to allow unicode in package
>> dependencies now, which breaks other programs expecting str...
>
...
> They provide things like "font(さざなみゴシック)"...

Explicitly encoding the provides as UTF-8 changes back
to "str" from "unicode" (they were loaded from UTF-8),
this makes the metadata loader work with 11/rawhide and
additionally returns the same thing as the rpm db loader.

See https://bugs.launchpad.net/smart/+bug/337798 for patch
Probably needs revisiting for "real" unicode dependencies.

--anders