gnu: pulseaudio: Increase timeouts for tests.

* gnu/packages/pulseaudio.scm: Set the 'CK_DEFAULT_TIMEOUT' environment
  variable to 120 in the 'pre-check' phase.  Suggested by Ludovic Courtès.

gnu/packages/pulseaudio.scm

 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -152,7 +153,10 @@ (define pulseaudio
                  (lambda _
                    ;; 'tests/lock-autospawn-test.c' wants to create a file
                    ;; under ~/.config/pulse.
-                   (setenv "HOME" (getcwd)))
+                   (setenv "HOME" (getcwd))
+                   ;; 'thread-test' needs more time on hydra and on slower
+                   ;; machines, so we set the default timeout to 120 seconds.
+                   (setenv "CK_DEFAULT_TIMEOUT" "120"))
                  %standard-phases)))
     (inputs
      ;; TODO: Add optional inputs (GTK+?).