[packagekit] Fix PackageKit's pkgconfig

[Tom Parker]

On 09/11/2007, Richard Hughes <hughsient at gmail.com> wrote:
> ./autogen.sh
> ....
> configure: error: conditional "APT_SEARCH_PLAIN" was never defined.
> Usually this means the macro was only invoked conditionally.
>
> And ./autogen.sh bombs out. Any ideas?

I see you've fixed it.. yeah, should have tested with non-apt stuff.
I'll need to add (at least) one more symbol like that at some point,
so I'll try and remember not to mess it up again.

Tom