gnu: gegl: Update to 0.4.12.

* gnu/packages/gimp.scm (gegl): Update to 0.4.12.

gnu/packages/gimp.scm

@@ -80,7 +80,7 @@ (define-public babl
 (define-public gegl
   (package
     (name "gegl")
-    (version "0.4.8")
+    (version "0.4.12")
     (source (origin
               (method url-fetch)
               (uri (list (string-append "https://download.gimp.org/pub/gegl/"
@@ -88,7 +88,7 @@ (define-public gegl
                                         "/" name "-" version ".tar.bz2")))
               (sha256
                (base32
-                "0jdfhf8wikba4h68k505x0br3gisiwivc33aca8v3ibaqpp6i53i"))))
+                "0ljqxc4iyy2hrj31pxcy1xp4xm5zbx1nigqisphmg4p8mcz2jrz9"))))
     (build-system gnu-build-system)
     (arguments
      '(#:configure-flags '("LDFLAGS=-lm")))