Update and un-xfail crate-method-reexport-grrrrrrr2

Closes #3155

Author: catamorphism

src/test/auxiliary/crate-method-reexport-grrrrrrr2.rs

@@ -22,9 +22,7 @@ mod name_pool {
 mod rust {
     #[legacy_exports];
 
-    import name_pool::add;
-    // FIXME #3155: this is a hack
-    import name_pool::__extensions__;
+    use name_pool::add;
     export add;
     export rt;
     export cx;

src/test/run-pass/crate-method-reexport-grrrrrrr.rs

@@ -2,15 +2,14 @@
 // name_pool::methods impl in the other crate is reachable from this
 // crate.
 
-// xfail-test
 // xfail-fast
 // aux-build:crate-method-reexport-grrrrrrr2.rs
 
-use crate_method_reexport_grrrrrrr2;
+extern mod crate_method_reexport_grrrrrrr2;
 
 fn main() {
-    import crate_method_reexport_grrrrrrr2::rust::add;
-    import crate_method_reexport_grrrrrrr2::rust::cx;
+    use crate_method_reexport_grrrrrrr2::rust::add;
+    use crate_method_reexport_grrrrrrr2::rust::cx;
     let x = @();
     x.cx();
     let y = ();