gnu: libunistring: Update to 0.9.10.

* gnu/packages/libunistring.scm (libunistring): Update to 0.9.10.
[source]: Remove now-unnecessary snippet.

gnu/packages/libunistring.scm

@@ -5,6 +5,7 @@
 ;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
 ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
 ;;; Copyright © 2017 Eric Bavier <bavier@member.fsf.org>
+;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -32,7 +33,7 @@
 (define-public libunistring
   (package
    (name "libunistring")
-   (version "0.9.9")
+   (version "0.9.10")
    (source (origin
             (method url-fetch)
             (uri (string-append
@@ -40,17 +41,7 @@
                   version ".tar.xz"))
             (sha256
              (base32
-              "0cx8v6862w7vvacbkcvg49kfx731ckdgaybmzw1zav71zkn97nd4"))
-            (modules '((guix build utils)))
-            (snippet
-             '(begin
-                ;; The gnulib test-lock test is prone to writer starvation
-                ;; with our glibc@2.25, which prefers readers, so disable it.
-                ;; The gnulib commit b20e8afb0b2 should fix this once
-                ;; incorporated here.
-                (substitute* "tests/Makefile.in"
-                  (("test-lock\\$\\(EXEEXT\\) ") ""))
-                #t))))
+              "1mq57h06622m6qc5cv347fc3qk5mj840axw3c0vd7qmnwk1v53zb"))))
    (propagated-inputs (libiconv-if-needed))
    (build-system gnu-build-system)
    (arguments