CI: document the new gdkwayland crates (#719)

* CI: document the new gdkwayland crates

Author: bilelmoussaoui

.github/workflows/docs.yml

@@ -37,7 +37,7 @@ jobs:
       - uses: actions-rs/cargo@v1
         with:
           command: doc
-          args: -p atk -p atk-sys -p gdk -p gdk-sys -p gdkx11 -p gdkx11-sys -p gtk -p gtk3-macros -p gtk-sys --features dox --no-deps
+          args: -p atk -p atk-sys -p gdk -p gdk-sys -p gdkx11 -p gdkx11-sys -p gtk -p gtk3-macros -p gtk-sys -p gdkwayland -p gdkwayland-sys --features dox --no-deps
       - run: echo "RELEASE=$(echo '${{ github.event.release.tag_name }}' | grep -Po '(\d+)\.(\d+)')" >> ${GITHUB_ENV}
       - run: echo "DEST=stable/0.15" >> ${GITHUB_ENV}
       - name: Grab gtk-rs LOGO

gdkwayland/src/lib.rs

@@ -1,5 +1,6 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
+#![cfg_attr(feature = "dox", feature(doc_cfg))]
 #![doc = include_str!("../README.md")]
 
 pub use ffi;

gdkwayland/sys/src/lib.rs

@@ -1,3 +1,5 @@
+#![cfg_attr(feature = "dox", feature(doc_cfg))]
+
 use gdk::{GdkAtom, GdkDevicePadFeature};
 use glib::{gpointer, GType};
 use libc::{c_char, c_int, c_uint};