Rollup merge of #128925 - dingxiangfei2009:smart-ptr-helper-attr, r=c…

Rollup merge of #128925 - dingxiangfei2009:smart-ptr-helper-attr, r=c… · patricklam/verify-rust-std@383c4db

Original file line number	Diff line number	Diff line change
`@@ -1060,7 +1060,7 @@ pub trait FnPtr: Copy + Clone {`
`1060`	`1060`	`}`
`1061`	`1061`
`1062`	`1062`	`/// Derive macro generating impls of traits related to smart pointers.`
`1063`		`-#[rustc_builtin_macro]`
	`1063`	`+#[rustc_builtin_macro(SmartPointer, attributes(pointee))]`
`1064`	`1064`	`#[allow_internal_unstable(dispatch_from_dyn, coerce_unsized, unsize)]`
`1065`	`1065`	`#[unstable(feature = "derive_smart_pointer", issue = "123430")]`
`1066`	`1066`	`pub macro SmartPointer($item:item) {`