gnu: usbredir: Add git commit to version.

* gnu/packages/spice.scm (usbredir)[version]: Add commit and revision to version
  string.

gnu/packages/spice.scm

@@ -44,9 +44,13 @@ (define-module (gnu packages spice)
   #:use-module (guix utils))
 
 (define-public usbredir
+  (let ((commit "ac80a5971c6318d73d5fba4b5f13d3a9389558c9")
+        (revision "1"))          ;Guix package revision
     (package
       (name "usbredir")
-    (version "0.7.1")
+      (version (string-append "0.7.1-" revision "."
+                              (string-take commit 7)))
+      ;(version "0.7.1")
       ;(source (origin
       ;          (method url-fetch)
       ;          (uri (string-append
@@ -62,7 +66,7 @@ (define-public usbredir
                 (method git-fetch)
                 (uri (git-reference
                         (url "http://cgit.freedesktop.org/spice/usbredir")
-                      (commit "ac80a5971c6318d73d5fba4b5f13d3a9389558c9")))
+                        (commit commit)))
                 (sha256
                  (base32
                   "052fywgi72j68dr5ybldncg4vk8iqfrh58la7iazyxxpph9aag1g"))))
@@ -82,11 +86,11 @@ (define-public usbredir
              (system* "sh" "autogen.sh"))))))
       (synopsis "Tools for sending USB device traffic over a network")
       (description "Usbredir is a network protocol for sending USB device traffic
-over a network connection.  It can be used to redirect traffic from a USB device
-to a different (virtual) machine than the one to which the USB device is
-attached.")
+  over a network connection.  It can be used to redirect traffic from a USB device
+  to a different (virtual) machine than the one to which the USB device is
+  attached.")
       (home-page "http://www.spice-space.org")
-    (license (list license:gpl2+ license:lgpl2.0+ license:lgpl2.1+))))
+      (license (list license:gpl2+ license:lgpl2.0+ license:lgpl2.1+)))))
 
 (define-public virglrenderer
   (package