gnu: xorg-server: Update to 21.1.2 [security fixes].

Fixes CVE-2021-4008, CVE-2021-4009, CVE-2021-4010, and CVE-2021-4011.

* gnu/packages/xorg.scm (xorg-server): Update to 21.1.2.
(xorg-server-for-tests): Use version 21.1.1.

gnu/packages/xorg.scm

@@ -5235,16 +5235,15 @@ by the Xorg server.")
 (define-public xorg-server
   (package
     (name "xorg-server")
-    (version "21.1.1")
+    (version "21.1.2")
     (source
      (origin
        (method url-fetch)
-
        (uri (string-append "https://xorg.freedesktop.org/archive/individual"
                            "/xserver/xorg-server-" version ".tar.xz"))
        (sha256
         (base32
-         "0md7dqsc5qb30gym06c4zc2cjsdc5ps8nywk1bkcpix05kppybkq"))
+         "1c4dgvpv3kib8rhw37b00vc056nlb1z66c2lwzs4prz8kxmg82y2"))
        (patches
         (list
          ;; See:
@@ -5361,7 +5360,30 @@ draggable titlebars and borders.")
 (define-public xorg-server-for-tests
   (hidden-package
    (package
-     (inherit xorg-server))))
+     (inherit xorg-server)
+     (version "21.1.1")
+     (source
+      (origin
+        (method url-fetch)
+        (uri (string-append "https://xorg.freedesktop.org/archive/individual"
+                            "/xserver/xorg-server-" version ".tar.xz"))
+        (sha256
+         (base32
+          "0md7dqsc5qb30gym06c4zc2cjsdc5ps8nywk1bkcpix05kppybkq"))
+        (patches
+         (list
+          ;; See:
+          ;;   https://lists.fedoraproject.org/archives/list/devel@lists.
+          ;;      fedoraproject.org/message/JU655YB7AM4OOEQ4MOMCRHJTYJ76VFOK/
+          (origin
+            (method url-fetch)
+            (uri (string-append
+                  "http://pkgs.fedoraproject.org/cgit/rpms/xorg-x11-server.git"
+                  "/plain/06_use-intel-only-on-pre-gen4.diff"))
+            (sha256
+             (base32
+              "0mm70y058r8s9y9jiv7q2myv0ycnaw3iqzm7d274410s0ik38w7q"))
+            (file-name "xorg-server-use-intel-only-on-pre-gen4.diff")))))))))
 
 (define-public eglexternalplatform
   (package