Added xfail-fast to test so the windows buildbot doesn't choke

Author: James Miller

src/test/run-pass/attr-start.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+//xfail-fast
+
 #[start]
 fn start(argc:int, argv: **u8, crate_map: *u8) -> int {
     return 0;