Missing inlining for private re-export

[GuillaumeGomez]

This code is failing:

pub use crate::bar::Foo;
pub mod bar;

// bar/mod.rs
mod priv_mod;
pub use self::priv_mod::Foo;

// bar/priv_mod.rs
pub struct Foo;

Foo should be inlined in bar but isn't. The regression appeared in #108870.