gnu: libva: Build with wayland support.

* gnu/packages/video.scm (libva)[inputs]: Add wayland.
* gnu/packages/gl.scm (libva-without-mesa)[inputs]: Remove wayland.

gnu/packages/gl.scm

@@ -55,7 +55,8 @@ (define-module (gnu packages gl)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
   #:use-module (guix utils)
-  #:use-module (ice-9 match))
+  #:use-module (ice-9 match)
+  #:use-module (srfi srfi-1))
 
 (define-public glu
   (package
@@ -211,7 +212,8 @@ (define libva-without-mesa
     (package
       (inherit libva)
       (name "libva-without-mesa")
-      (inputs (alist-delete "mesa" (package-inputs libva)))
+      (inputs `(,@(fold alist-delete (package-inputs libva)
+                        '("mesa" "wayland"))))
       (arguments
        (strip-keyword-arguments
         '(#:make-flags)

gnu/packages/video.scm

@@ -564,7 +564,8 @@ (define-public libva
        ("libx11" ,libx11)
        ("libxext" ,libxext)
        ("libxfixes" ,libxfixes)
-       ("mesa" ,mesa)))
+       ("mesa" ,mesa)
+       ("wayland" ,wayland)))
     (arguments
      `(#:phases
        (modify-phases %standard-phases