gnu: Add wayland-protocols-next.

* gnu/packages/freedesktop.scm (wayland-protocols-next): New variable.

Change-Id: I583e15e0414422ffa300d310b083a62efbfde22b

gnu/packages/freedesktop.scm

@@ -1405,6 +1405,19 @@ protocol either in Wayland core, or some other protocol in wayland-protocols.")
         . "https://wayland.freedesktop.org/releases.html")))
     (license license:expat)))
 
+(define-public wayland-protocols-next
+  (package (inherit wayland-protocols)
+           (name "wayland-protocols-next")
+           (version "1.36")
+           (source (origin
+                     (method url-fetch)
+                     (uri (string-append "https://gitlab.freedesktop.org/wayland/"
+                                         "wayland-protocols/-/releases/" version "/downloads/"
+                                         "wayland-protocols-" version ".tar.xz"))
+                     (sha256
+                      (base32
+                       "14kyxywpfkgpjpkrybs28q1s2prnz30k1b4zap5a3ybrbvh4vzbi"))))))
+
 (define-public wayland-utils
   (package
     (name "wayland-utils")