Add a test for cross-crate struct variants

Author: SiegeLord

src/test/auxiliary/struct-variant-xc-aux.rs

@@ -0,0 +1,17 @@
+// Copyright 2013 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.
+
+#[link(name = "struct_variant_xc_aux",
+       vers = "0.1")];
+#[crate_type = "lib"];
+
+pub enum Enum {
+    Variant { arg: u8 }
+} 

src/test/run-pass/struct-variant-xc.rs

@@ -0,0 +1,18 @@
+// Copyright 2013 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.
+
+// aux-build:struct-variant-xc-aux.rs
+extern mod struct_variant_xc_aux;
+
+use struct_variant_xc_aux::Variant;
+
+fn main() {
+	let _ = Variant { arg: 1 };
+}