devel packages with only one .pc file

[Stepan Kasal]

Hello,

though I was not aware of the rule ``.pc to -devel,'' I happened to
reinvent it a few weeks ago, for my java-gnome packages.

And yes, dependencies are the main reason for these -devel packages,
even if they do not contain anything but a tiny file.
For example, libglade-java-devel requires libglade2-devel, which
brings all the glib-devel baggage.
If the base libglade-java required libglade2-devel, then all the
machines which want only runtime would have the whole -devel of the
whole Gnome.  This is not acceptable.

Stepan Kasal