Add more from the std

library/std/src/sys/os_str/mod.rs

@@ -0,0 +1,16 @@
+#![forbid(unsafe_op_in_unsafe_fn)]
+
+cfg_select! {
+    any(target_os = "windows", target_os = "uefi") => {
+        mod wtf8;
+        pub use wtf8::{Buf, Slice};
+    }
+    any(target_os = "motor") => {
+        mod utf8;
+        pub use utf8::{Buf, Slice};
+    }
+    _ => {
+        mod bytes;
+        pub use bytes::{Buf, Slice};
+    }
+}