gnu: gnumach-headers: Update to 1.5

* gnu/packages/hurd.scm (gnumach-headers): Update to version 1.5.

gnu/packages/hurd.scm

 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2014 Manolis Fragkiskos Ragkousis <manolis837@gmail.com>
+;;; Copyright © 2014, 2015 Manolis Fragkiskos Ragkousis <manolis837@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -29,7 +29,7 @@ (define-module (gnu packages hurd)
 (define-public gnumach-headers
   (package
     (name "gnumach-headers")
-    (version "1.4")
+    (version "1.5")
     (source
      (origin
       (method url-fetch)
@@ -37,7 +37,7 @@ (define-public gnumach-headers
                           version ".tar.gz"))
       (sha256
        (base32
-        "0r371wsm7imx356p0xsls5hifb1gf9y90rm1phr0qkahbmfk9hlv"))))
+        "0wsf57q4h6xl2jn28d423qx7zplmhpnf9ssm4f1c0sf8513xm81j"))))
     (build-system gnu-build-system)
     (arguments
     `(#:phases (alist-replace