[flickr] Fix dependencies
[flickr] Fix dependencies

Flickcurl depends both on xml2 and libcurl.

vrutkovs/grilo-plugins,GNOME/grilo-plugins,MathieuDuponchelle/grilo-plugins,GNOME/grilo-plugins,kyoushuu/grilo-plugins,MathieuDuponchelle/grilo-plugins,vrutkovs/grilo-plugins,MikePetullo/grilo-plugins,kyoushuu/grilo-plugins,MikePetullo/grilo-plugins,jasuarez/grilo-plugins,grilofw/grilo-plugins,jasuarez/grilo-plugins,MathieuDuponchelle/grilo-plugins,grilofw/grilo-plugins,kyoushuu/grilo-plugins,MikePetullo/grilo-plugins,MathieuDuponchelle/grilo-plugins,vrutkovs/grilo-plugins,vrutkovs/grilo-plugins