don't encode_cross_crate rustc_objc_{class,selector}

Author: jbatez

compiler/rustc_feature/src/builtin_attrs.rs

@@ -1050,11 +1050,11 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
     ),
     rustc_attr!(
         rustc_objc_class, Normal, template!(NameValueStr: "ClassName"), ErrorPreceding,
-        EncodeCrossCrate::Yes,
+        EncodeCrossCrate::No,
     ),
     rustc_attr!(
         rustc_objc_selector, Normal, template!(NameValueStr: "methodName"), ErrorPreceding,
-        EncodeCrossCrate::Yes,
+        EncodeCrossCrate::No,
     ),
 
     // ==========================================================================

compiler/rustc_hir/src/attrs/encode_cross_crate.rs

@@ -59,8 +59,8 @@ impl AttributeKind {
             NoImplicitPrelude(..) => No,
             NoMangle(..) => Yes,      // Needed for rustdoc
             NonExhaustive(..) => Yes, // Needed for rustdoc
-            ObjcClass { .. } => Yes,
-            ObjcSelector { .. } => Yes,
+            ObjcClass { .. } => No,
+            ObjcSelector { .. } => No,
             Optimize(..) => No,
             ParenSugar(..) => No,
             PassByValue(..) => Yes,