Add i suffix to cfail test so it works after suffix inference

src/test/compile-fail/do2.rs

@@ -1,5 +1,5 @@
-fn f(f: fn@(int) -> bool) -> bool { f(10) }
+fn f(f: fn@(int) -> bool) -> bool { f(10i) }
 
 fn main() {
-    assert do f() { |i| i == 10 } == 10; //! ERROR: expected `bool` but found `int`
+    assert do f() { |i| i == 10i } == 10i; //! ERROR: expected `bool` but found `int`
 }