`cargo-gpu-install` doesn't recompile things when code changes

[nazar-pc]

When using cargo-gpu-install from build.rs, shader is not recompiled on source code changes unless build.rs changes too.

This is essentially a flavor of #575, but this time about source code.

[Firestar99]

Have you enabled spirv_builder.build_script.defaults = true?

[nazar-pc]

Actually yes: https://github.com/nazar-pc/abundance/blob/962ff91eac83e9d8664a13ebf9094ec89696d278/crates/farmer/ab-proof-of-space-gpu/build.rs#L57