[xmlsec] --with-libxml-src break pkg-config tests

[Roumen Petrov]

Aleksey Sanin wrote:
> Thanks for bug report! I think this should fix it
>
> http://git.gnome.org/browse/xmlsec/diff/configure.in?id=361f8ef176f9f6920f8846f1d9b5361f7b0849c4
>
>
> Could you please try it and let me know if you still
> have problems?
>
> Thanks
> Aleksey

Go ahead If you plan to release new version in next two weeks. The issue 
is not for regular builds.

Roumen