auto merge of #17787 : bgamari/rust/fix-quote-method, r=huonw

The previous fix introduced in 75d49c8203 neglected to parse outer attributes as described in #17782.

src/test/run-pass-fulldeps/quote-tokens.rs

@@ -37,6 +37,7 @@ fn syntax_extension(cx: &ExtCtxt) {
     assert!(i.is_some());
 
     let _j: P<syntax::ast::Method> = quote_method!(cx, fn foo(&self) {});
+    let _k: P<syntax::ast::Method> = quote_method!(cx, #[doc = "hello"] fn foo(&self) {});
 }
 
 fn main() {