gnu: Move desktop-file-utils to (gnu packages freedesktop).

* gnu/packages/gnome.scm (desktop-file-utils): Move from here ...
* gnu/packages/freedesktop.scm (desktop-file-utils): ... to here.
* gnu/packages/engineering.scm: Import (gnu packages freedesktop).
* gnu/packages/game-development.scm: Import (gnu packages freedesktop).
* gnu/packages/xfce.scm: Import (gnu packages freedesktop).

gnu/packages/engineering.scm

@@ -44,6 +44,7 @@
   #:use-module (gnu packages curl)
   #:use-module (gnu packages flex)
   #:use-module (gnu packages fontutils)
+  #:use-module (gnu packages freedesktop)
   #:use-module (gnu packages gd)
   #:use-module (gnu packages gettext)
   #:use-module (gnu packages ghostscript)

gnu/packages/freedesktop.scm

@@ -968,3 +968,35 @@ library to access fingerprint readers, over the D-Bus interprocess
 communication bus.  This daemon layer above libfprint solves problems related
 to applications simultaneously competing for fingerprint readers.")
     (license license:gpl2+)))
+
+(define-public desktop-file-utils
+  (package
+    (name "desktop-file-utils")
+    (version "0.23")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://www.freedesktop.org/software/" name
+                                  "/releases/" name "-" version ".tar.xz"))
+              (sha256
+               (base32
+                "119kj2w0rrxkhg4f9cf5waa55jz1hj8933vh47vcjipcplql02bc"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
+    (inputs
+     `(("glib" ,glib)))
+    (home-page "http://www.freedesktop.org/wiki/Software/desktop-file-utils/")
+    (synopsis "Utilities for working with desktop entries")
+    (description
+     "This package contains a few command line utilities for working with
+desktop entries:
+
+desktop-file-validate: validates a desktop file and prints warnings/errors
+                       about desktop entry specification violations.
+
+desktop-file-install: installs a desktop file to the applications directory,
+                      optionally munging it a bit in transit.
+
+update-desktop-database: updates the database containing a cache of MIME types
+                         handled by desktop files.")
+    (license license:gpl2+)))

gnu/packages/game-development.scm

@@ -39,6 +39,7 @@
   #:use-module (gnu packages databases)
   #:use-module (gnu packages documentation)
   #:use-module (gnu packages fontutils)
+  #:use-module (gnu packages freedesktop)
   #:use-module (gnu packages fribidi)
   #:use-module (gnu packages glib)
   #:use-module (gnu packages gnunet)

gnu/packages/gnome.scm

@@ -736,38 +736,6 @@ Specification, the icon naming utility maps the icon names used by the
 GNOME and KDE desktops to the icon names proposed in the specification.")
     (license license:lgpl2.1+)))
 
-(define-public desktop-file-utils
-  (package
-    (name "desktop-file-utils")
-    (version "0.23")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "https://www.freedesktop.org/software/" name
-                                  "/releases/" name "-" version ".tar.xz"))
-              (sha256
-               (base32
-                "119kj2w0rrxkhg4f9cf5waa55jz1hj8933vh47vcjipcplql02bc"))))
-    (build-system gnu-build-system)
-    (native-inputs
-     `(("pkg-config" ,pkg-config)))
-    (inputs
-     `(("glib" ,glib)))
-    (home-page "http://www.freedesktop.org/wiki/Software/desktop-file-utils/")
-    (synopsis "Utilities for working with desktop entries")
-    (description
-     "This package contains a few command line utilities for working with
-desktop entries:
-
-desktop-file-validate: validates a desktop file and prints warnings/errors
-                       about desktop entry specification violations.
-
-desktop-file-install: installs a desktop file to the applications directory,
-                      optionally munging it a bit in transit.
-
-update-desktop-database: updates the database containing a cache of MIME types
-                         handled by desktop files.")
-    (license license:gpl2+)))
-
 (define-public gnome-icon-theme
   (package
     (name "gnome-icon-theme")

gnu/packages/xfce.scm

@@ -39,6 +39,7 @@
   #:use-module (gnu packages xdisorg)
   #:use-module (gnu packages web)
   #:use-module (gnu packages fontutils)
+  #:use-module (gnu packages freedesktop)
   #:use-module (gnu packages image)
   #:use-module (gnu packages gnome)
   #:use-module (gnu packages pdf)