WIP: Add an xfailed test for bind-by-move (#2329)

Author: bblum

src/test/run-pass/bind-by-move.rs

@@ -0,0 +1,13 @@
+// xfail-test
+use std;
+import std::arc;
+fn dispose(+_x: arc::arc<bool>) unsafe { }
+
+fn main() {
+    let p = arc::arc(true);
+    let x = some(p);
+    match move x {
+        some(move z) => { dispose(z); },
+        none => fail
+    }
+}