gnu: libusb-0.1: fix build failure on newer gcc

* gnu/packages/libusb.scm (libusb-0.1): Disable -Werror.

Signed-off-by: Jakub Kądziołka <kuba@kadziolka.net>

gnu/packages/libusb.scm

@@ -8,6 +8,7 @@
 ;;; Copyright © 2017 Jonathan Brielmaier <jonathan.brielmaier@web.de>
 ;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2018 Vagrant Cascadian <vagrant@debian.org>
+;;; Copyright © 2020 Christopher Howard <christopher@librehacker.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -113,7 +114,8 @@ (define-public libusb-0.1
       (sha256
        (base32
         "0i4bacxkyr7xyqxbmb00ypkrv4swkgm0mghbzjsnw6blvvczgxip"))
-      (patches (search-patches "libusb-0.1-disable-tests.patch"))))))
+      (patches (search-patches "libusb-0.1-disable-tests.patch"))))
+    (arguments `(#:configure-flags (list "CFLAGS=-Wno-error")))))
 
 (define-public libusb4java
   ;; There is no public release so we take the latest version from git.