gnu: Add libgames-support.

* gnu/packages/gnome.scm (libgames-support): New variable.

gnu/packages/gnome.scm

@@ -2911,6 +2911,42 @@ (define-public gom
 queries upon that data.")
     (license license:lgpl2.1+)))
 
+(define-public libgames-support
+  (package
+    (name "libgames-support")
+    (version "1.0.2")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://gnome/sources/" name "/"
+                                  (version-major+minor version) "/"
+                                  name "-" version ".tar.xz"))
+              (sha256
+               (base32
+                "0rms2ksiv7j9944km7r87q22nh05si1fisn5xm3z4zy5vpcfi5mh"))))
+    (build-system gnu-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'pre-check
+           (lambda _
+             ;; tests require a writable HOME.
+             (setenv "HOME" (getcwd))
+             #t)))))
+    (native-inputs
+     `(("intltool" ,intltool)
+       ("pkg-config" ,pkg-config)
+       ("vala" ,vala)))
+    (propagated-inputs
+     ;; Required by libgames-support-1.0.pc
+     `(("gtk+" ,gtk+)
+       ("libgee" ,libgee)))
+    (home-page "https://www.gnome.org/")
+    (synopsis "Useful functionality shared among GNOME games")
+    (description
+     "libgames-support is a small library intended for internal use by
+GNOME Games, but it may be used by others.")
+    (license license:lgpl3+)))
+
 (define-public gnome-klotski
   (package
     (name "gnome-klotski")