Adding i suffixes so cfail tests keep failing after suffix inference

src/test/compile-fail/fail-type-err.rs

@@ -1,2 +1,2 @@
 // error-pattern:expected `str` but found `[int]`
-fn main() { fail [0]; }
+fn main() { fail [0i]; }

src/test/compile-fail/issue-897.rs

@@ -1,5 +1,5 @@
 fn f() -> ! {
-    ret 42; //! ERROR expected `_|_` but found `int`
+    ret 42i; //! ERROR expected `_|_` but found `int`
     fail; //! WARNING unreachable statement
 }
 fn main() { }