ICE on misplaced lang attribute

[klutzy]

#[no_std];
#[lang="start"] mod x {}
fn main() {}

error: internal compiler error: node_id_to_type: no type for node `mod x (id=2)`

[huonw]

Related to #9307 (tangentially, at least).

[thestinger]

I think we can consider this to be a duplicate of that bug, this is what I meant by type-check.