Add errno_location shim for MacOS

Author: pvdrz

src/shims/foreign_items.rs

@@ -418,7 +418,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
                 }
             }
 
-            "__errno_location" => {
+            "__errno_location" | "__error" => {
                 let errno_scalar: Scalar<Tag> = this.machine.last_error.unwrap().into();
                 this.write_scalar(errno_scalar, dest)?;
             }