gnu: rust-wayland-sys: Add 0.29.

* gnu/packages/crates-graphics.scm (rust-wayland-sys-0.29): New variable.
(rust-wayland-sys-0.28): Inherit from it.

gnu/packages/crates-graphics.scm

@@ -2864,8 +2864,51 @@ the wayland protocol, server side.")
         ("rust-wayland-sys" ,rust-wayland-sys-0.21)
         ("rust-wayland-scanner" ,rust-wayland-scanner-0.21))))))
 
+(define-public rust-wayland-sys-0.29
+  (package
+    (name "rust-wayland-sys")
+    (version "0.29.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "wayland-sys" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1m2jwk5q36jidwbdmdicmi27r9dzi4wanzg3i28nfxc9kbvisd6r"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-dlib" ,rust-dlib-0.5)
+        ("rust-lazy-static" ,rust-lazy-static-1)
+        ("rust-libc" ,rust-libc-0.2)
+        ("rust-memoffset" ,rust-memoffset-0.6)
+        ("rust-pkg-config" ,rust-pkg-config-0.3))
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-libraries
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((libwayland (dirname (search-input-file
+                                         inputs "lib/libwayland-client.so"))))
+               (substitute* (find-files "src" "\\.rs$")
+                 (("libwayland.*\\.so" shared-lib)
+                  (string-append libwayland "/" shared-lib)))))))))
+    (inputs
+     (list rust-dlib-0.5 rust-lazy-static-1 rust-libc-0.2
+           rust-pkg-config-0.3))
+    (propagated-inputs
+     (list wayland))
+    (home-page "https://github.com/smithay/wayland-rs")
+    (synopsis "FFI bindings to the various @file{libwayland-*.so} libraries")
+    (description
+     "This package provides FFI bindings to the various
+@file{libwayland-*.so} libraries.  You should only need this crate if
+you are working on custom Wayland protocol extensions.  Look at the
+crate @code{rust-wayland-client} for usable bindings.")
+    (license license:expat)))
+
 (define-public rust-wayland-sys-0.28
   (package
+    (inherit rust-wayland-sys-0.29)
     (name "rust-wayland-sys")
     (version "0.28.3")
     (source
@@ -2895,15 +2938,7 @@ the wayland protocol, server side.")
      (list rust-dlib-0.4 rust-lazy-static-1 rust-libc-0.2
            rust-pkg-config-0.3))
     (propagated-inputs
-     (list wayland))
+     (list wayland))))
-    (home-page "https://github.com/smithay/wayland-rs")
-    (synopsis "FFI bindings to the various @file{libwayland-*.so} libraries")
-    (description
-     "This package provides FFI bindings to the various
-@file{libwayland-*.so} libraries.  You should only need this crate if
-you are working on custom Wayland protocol extensions.  Look at the
-crate @code{rust-wayland-client} for usable bindings.")
-    (license license:expat)))
 
 (define-public rust-wayland-sys-0.23
   (package