Un-XFAIL break-value

It passes thanks to the previous two commits.

Author: catamorphism

src/test/run-pass/break-value.rs

@@ -1,7 +1,4 @@
-//xfail-stage0
-//xfail-stage1
-//xfail-stage2
-//xfail-stage3
+// xfail-stage0
 fn int_id(int x) -> int {
   ret x;
 }