test: Add xfailed test for #2196

Author: brson

src/test/auxiliary/issue-2196-a.rs

@@ -0,0 +1,3 @@
+#[link(name = "issue2196a", vers = "0.1")];
+#[crate_type = "lib"];
+

src/test/auxiliary/issue-2196-b.rs

@@ -0,0 +1,8 @@
+#[link(name = "issue2196b", vers = "0.1")];
+#[crate_type = "lib"];
+
+use a(name = "issue2196a");
+
+type d = str;
+impl d for d { }
+

src/test/auxiliary/issue-2196-c.rc

@@ -0,0 +1,6 @@
+#[link(name = "issue2196c", vers = "0.1")];
+#[crate_type = "lib"];
+
+use b(name = "issue2196b");
+#[path = "issue-2196-d.rs"]
+mod d;

src/test/auxiliary/issue-2196-c.rs

@@ -0,0 +1,4 @@
+import b::d;
+
+type t = uint;
+

src/test/auxiliary/issue-2196-d.rs

@@ -0,0 +1,9 @@
+// xfail-test
+// aux-build:issue-2196-a.rs
+// aux-build:issue-2196-b.rs
+// aux-build:issue-2196-c.rc
+
+use c(name = "issue2196c");
+import c::t;
+
+fn main() { }