Support for a statically linked vulkan library

[lucypero]

My platform's Vulkan driver is a static library. How do I plug that with ash?

[MaikKlein]

It is currently being worked on #457. Otherwise you can have a look at https://github.com/EmbarkStudios/ash-molten/blob/main/src/lib.rs to see how it statically links with moltevk.

[MarijnS95]

For ash-molten you can effectively add println!("cargo:rustc-link-lib=static=./path/to/your/libvulkan.a"); as suggested here (note that that PR is required on Ash 0.33 going forwards) in build.rs for your respective platform, and we'll probably try to figure out how to make dynamic and static linking as configurable as possible in #457, linked above already.