xfail-fast once fn run-pass tests

Author: bblum

src/test/run-pass/once-move-out-on-heap.rs

@@ -10,6 +10,8 @@
 
 // Testing guarantees provided by once functions.
 
+// xfail-fast
+
 extern mod extra;
 use extra::arc;
 use std::util;

src/test/run-pass/once-move-out-on-stack.rs

@@ -10,6 +10,8 @@
 
 // Testing guarantees provided by once functions.
 
+// xfail-fast
+
 // compile-flags:-Z once-fns
 extern mod extra;
 use extra::arc;