win32: Guard std::os::windows usage

Otherwise we fail to find std::os::windows when building docs

Author: bilelmoussaoui

gio-win32/src/input_stream.rs

@@ -1,5 +1,6 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
+#[cfg(any(windows, docsrs))]
 use std::os::windows::io::{AsRawHandle, FromRawHandle, IntoRawHandle, RawHandle};
 
 use glib::{prelude::*, translate::*};

gio-win32/src/output_stream.rs

@@ -1,5 +1,6 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
+#[cfg(any(windows, docsrs))]
 use std::os::windows::io::{AsRawHandle, FromRawHandle, IntoRawHandle, RawHandle};
 
 use glib::{prelude::*, translate::*};

glib-win32/src/functions.rs

@@ -4,6 +4,7 @@ use std::path::PathBuf;
 
 #[doc(alias = "g_win32_get_package_installation_directory_of_module")]
 #[doc(alias = "get_package_installation_directory_of_module")]
+#[cfg(all(docsrs, windows))]
 pub fn package_installation_directory_of_module(
     hmodule: std::os::windows::raw::HANDLE,
 ) -> Result<PathBuf, std::io::Error> {