XFAIL some tests in stage 0

src/test/compile-fail/macro-2.rs

@@ -1,3 +1,4 @@
+// xfail-stage0
 //error-pattern:expanded as an identifier
 fn main() {
   #macro([#mylambda(x, body), {fn f(int x) -> int {ret body}; f}]);

src/test/compile-fail/macro.rs

@@ -1,3 +1,4 @@
+// xfail-stage0
 //error-pattern:no clauses match
 
 fn main() {