fix cross-crate-links test

hey look, macros properly link to the right place now

Author: QuietMisdreavus

src/test/rustdoc/cross-crate-links.rs

@@ -66,6 +66,6 @@ pub use all_item_types::FOO_STATIC;
 #[doc(no_inline)]
 pub use all_item_types::FOO_CONSTANT;
 
-// @has 'foo/index.html' '//a[@href="../foo/macro.foo_macro.html"]' 'foo_macro'
+// @has 'foo/index.html' '//a[@href="../all_item_types/macro.foo_macro.html"]' 'foo_macro'
 #[doc(no_inline)]
 pub use all_item_types::foo_macro;