test: Fix some run-fail bustage. rs=bustage

Author: pcwalton

src/test/run-fail/unwind-box-fn-unique.rs

@@ -7,8 +7,8 @@ fn failfn() {
 fn main() {
     let y = ~0;
     let x = @fn~() {
-        log(error, y);
+        log(error, copy y);
     };
     failfn();
     log(error, x);
-}
+}

src/test/run-fail/unwind-box-fn.rs

@@ -7,8 +7,8 @@ fn failfn() {
 fn main() {
     let y = ~0;
     let x = @fn@() {
-        log(error, y);
+        log(error, copy y);
     };
     failfn();
     log(error, x);
-}
+}