Support static libraries

[willwwarner]

This does what is necessary for static library bindings to work.
This is used by libgnome-games-support-rs.

[sdroege]

This doesn't seem right to me. Even for static libraries, you want the -sys crate to "link" it so that the static library ends up being linked into the final build result.

This seems to be specific to how libgnome-games-support works, but I'm not sure what exactly that is. Can you explain the exact problems you're trying to solve here?

[willwwarner]

Can you explain the exact problems you're trying to solve here?

libgnome-gamers-support is a copylib, meaning its distribution is done by building it as meson subproject and statically linking it, instead of installing the library.

Even for static libraries, you want the -sys crate to "link" it so that the static library ends up being linked into the final build result.

Yes, I removed the linking step because I wanted to get my bindings to build without the subproject. I will fix that.