Windows: fix FileType PartialEq implementation

Author: ChrisDenton

library/std/src/sys/fs/windows.rs

@@ -3,6 +3,7 @@
 use crate::alloc::{Layout, alloc, dealloc};
 use crate::borrow::Cow;
 use crate::ffi::{OsStr, OsString, c_void};
+use crate::hash::{Hash, Hasher};
 use crate::io::{self, BorrowedCursor, Error, IoSlice, IoSliceMut, SeekFrom};
 use crate::mem::{self, MaybeUninit, offset_of};
 use crate::os::windows::io::{AsHandle, BorrowedHandle};
@@ -39,7 +40,7 @@ pub struct FileAttr {
     file_index: Option<u64>,
 }
 
-#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+#[derive(Copy, Clone, Eq, Debug)]
 pub struct FileType {
     attributes: u32,
     reparse_tag: u32,
@@ -1140,6 +1141,18 @@ impl FileType {
     }
 }
 
+impl PartialEq for FileType {
+    fn eq(&self, other: &Self) -> bool {
+        self.is_directory() == other.is_directory() && self.is_symlink() == other.is_symlink()
+    }
+}
+
+impl Hash for FileType {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        state.write(&[self.is_directory() as u8, self.is_symlink() as u8]);
+    }
+}
+
 impl DirBuilder {
     pub fn new() -> DirBuilder {
         DirBuilder