gnu: Add mate-icon-theme.

* gnu/packages/mate.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.
* gnu/packages/mate.scm (mate-icon-theme): New variable.

gnu-system.am

@@ -216,6 +216,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/mail.scm				\
   gnu/packages/make-bootstrap.scm		\
   gnu/packages/markdown.scm			\
+  gnu/packages/mate.scm             \
   gnu/packages/maths.scm			\
   gnu/packages/mc.scm				\
   gnu/packages/mcrypt.scm			\

gnu/packages/mate.scm

@@ -0,0 +1,53 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2016 Fabian Harfert <fhmgufs@web.de>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages mate)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix utils)
+  #:use-module (guix build-system gnu)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages glib)
+  #:use-module (gnu packages gtk)
+  #:use-module (gnu packages gnome))
+
+(define-public mate-icon-theme
+  (package
+    (name "mate-icon-theme")
+    (version "1.12.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "http://pub.mate-desktop.org/releases/"
+                                  (version-major+minor version) "/"
+                                  name "-" version ".tar.xz"))
+              (sha256
+               (base32
+                "0d91rvl9rw3xl8hmdcbb6xvi880kfmh2ra5chhrjimrjqgl57qkp"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("pkg-config" ,pkg-config)
+       ("intltool" ,intltool)
+       ("gtk+" ,gtk+)
+       ("icon-naming-utils" ,icon-naming-utils)))
+    (home-page "http://mate-desktop.org/")
+    (synopsis "The MATE desktop environment icon theme")
+    (description
+     "This package contains the default icon theme used by the MATE desktop.")
+    (license license:lgpl3+)))