compiler: Directly use rustc_abi in session

Author: workingjubilee

compiler/rustc_session/src/cstore.rs

@@ -5,6 +5,7 @@
 use std::any::Any;
 use std::path::PathBuf;
 
+use rustc_abi::ExternAbi;
 use rustc_ast as ast;
 use rustc_data_structures::sync::{self, AppendOnlyIndexVec, FreezeLock};
 use rustc_hir::def_id::{
@@ -14,7 +15,6 @@ use rustc_hir::definitions::{DefKey, DefPath, DefPathHash, Definitions};
 use rustc_macros::{Decodable, Encodable, HashStable_Generic};
 use rustc_span::Span;
 use rustc_span::symbol::Symbol;
-use rustc_target::spec::abi::Abi;
 
 use crate::search_paths::PathKind;
 use crate::utils::NativeLibKind;
@@ -148,7 +148,7 @@ pub enum DllCallingConvention {
 pub struct ForeignModule {
     pub foreign_items: Vec<DefId>,
     pub def_id: DefId,
-    pub abi: Abi,
+    pub abi: ExternAbi,
 }
 
 #[derive(Copy, Clone, Debug, HashStable_Generic)]