Revert "os2: Don't try to translate Windows file attributes to Unix mode flags"

This reverts commit 95923c2059.
It'll be updated later.

core/os/os2/stat_windows.odin

@@ -212,15 +212,11 @@ _file_type_from_create_file :: proc(wname: win32.wstring, create_file_attributes
 }
 
 _file_type_mode_from_file_attributes :: proc(file_attributes: win32.DWORD, h: win32.HANDLE, ReparseTag: win32.DWORD) -> (type: File_Type, mode: int) {
-	// NOTE(Jeroen): We don't translate mode flags for Linux when given to `chmod`.
-	//               Let's not do so for Windows for `chmod` or `read_directory_iterator` either.
-	//               They're *not* portable between Windows and non-Windows platforms.
-	//
-	//               It also leads to information loss as flags like Archive, Hidden and System have no equivalent there.
-	//               We can of course parse them so we can set the `.Symlink` and `.Directory` type, but we shouldn't pretend
-	//               that 0o644 is meaningful when returned as a mode.
-	//               `C:\bootmgr` as an example has attributes read only, hidden, system, archive. In no way is it sensible to replace that with 0o444.
-	mode = int(file_attributes)
+	if file_attributes & win32.FILE_ATTRIBUTE_READONLY != 0 {
+		mode |= 0o444
+	} else {
+		mode |= 0o666
+	}
 
 	is_sym := false
 	if file_attributes & win32.FILE_ATTRIBUTE_REPARSE_POINT == 0 {
@@ -233,6 +229,7 @@ _file_type_mode_from_file_attributes :: proc(file_attributes: win32.DWORD, h: wi
 		type = .Symlink
 	} else if file_attributes & win32.FILE_ATTRIBUTE_DIRECTORY != 0 {
 		type = .Directory
+		mode |= 0o111
 	} else if h != nil {
 		type = file_type(h)
 	}