rustc_resolve: bring back "struct called like a function" cross-crate.

src/test/compile-fail/auxiliary/issue_19452_aux.rs

@@ -0,0 +1,13 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+pub enum Homura {
+    Madoka { age: u32 }
+}

src/test/compile-fail/issue-19452.rs

@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// aux-build:issue_19452_aux.rs
+extern crate issue_19452_aux;
+
 enum Homura {
     Madoka { age: u32 }
 }
@@ -16,4 +19,8 @@ fn main() {
     let homura = Homura::Madoka;
     //~^ ERROR uses it like a function
     //~| struct called like a function
+
+    let homura = issue_19452_aux::Homura::Madoka;
+    //~^ ERROR uses it like a function
+    //~| struct called like a function
 }