Add new test for export globs, xfailed.

src/test/run-pass/export-glob.rs

@@ -0,0 +1,11 @@
+// xfail-test
+// Export the enum variants, without the enum
+
+mod foo {
+    export bar::*;
+    mod bar {
+        const a : int = 10;
+    }
+}
+
+fn main() { let v = foo::a; }