gnutls: fix the test-suite for 32 bits systems.

* gnu/packages/patches/gnutls-fix-tests-on-32-bits-system.patch: New file.
* gnu-system.am: Add it here...
* gnu/packages/gnutls.scm (gnutls): ... and use it here.

Thanks to Nikos Mavrogiannopoulos for providing this patch:
http://permalink.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/6778

gnu-system.am

@@ -188,6 +188,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/glib-tests-prlimit.patch			\
   gnu/packages/patches/glibc-bootstrap-system.patch		\
   gnu/packages/patches/glibc-no-ld-so-cache.patch		\
+  gnu/packages/patches/gnutls-fix-tests-on-32-bits-system.patch \
   gnu/packages/patches/grub-gets-undeclared.patch		\
   gnu/packages/patches/guile-1.8-cpp-4.5.patch			\
   gnu/packages/patches/guile-default-utf8.patch			\

gnu/packages/gnutls.scm

@@ -23,6 +23,7 @@ (define-module (gnu packages gnutls)
   #:use-module (guix build-system gnu)
   #:use-module ((gnu packages compression)
                 #:renamer (symbol-prefix-proc 'guix:))
+  #:use-module (gnu packages)
   #:use-module (gnu packages nettle)
   #:use-module (gnu packages guile)
   #:use-module (gnu packages perl)
@@ -65,12 +66,18 @@ (define-public gnutls
               (base32
                "1zi2kq3vcbqdy9khl7r6pgk4hgwibniasm9k6siasdvqjijq3ymb"))))
     (build-system gnu-build-system)
+    (arguments
+      `(#:patches (list (assoc-ref %build-inputs
+                                   "patch/fix-tests"))
+        #:patch-flags '("-p0")))
     (native-inputs
      `(("pkg-config" ,pkg-config)))
     (inputs
      `(("guile" ,guile-2.0)
        ("zlib" ,guix:zlib)
-       ("perl" ,perl)))
+       ("perl" ,perl)
+       ("patch/fix-tests"
+        ,(search-patch "gnutls-fix-tests-on-32-bits-system.patch"))))
     (propagated-inputs
      `(("libtasn1" ,libtasn1)
        ("nettle" ,nettle)

gnu/packages/patches/gnutls-fix-tests-on-32-bits-system.patch

@@ -0,0 +1,36 @@
+From b12040aeab5fbaf02677571db1d8bf1995bd5ee0 Mon Sep 17 00:00:00 2001
+From: Nikos Mavrogiannopoulos <nmav@gnutls.org>
+Date: Sun, 2 Jun 2013 12:10:06 +0200
+Subject: [PATCH] Avoid comparing the expiration date to prevent false positive
+error in 32-bit systems.
+
+---
+ tests/cert-tests/pem-decoding |    6 ++++--
+ 1 files changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/tests/cert-tests/pem-decoding b/tests/cert-tests/pem-decoding
+index fe769ec..f8c6372 100755
+--- tests/cert-tests/pem-decoding
++++ tests/cert-tests/pem-decoding
+@@ -61,7 +61,9 @@ if test "$rc" != "0"; then
+   exit $rc
+ fi
+ 
+-diff $srcdir/complex-cert.pem tmp-pem.pem
++cat $srcdir/complex-cert.pem |grep -v "Not After:" >tmp1
++cat $srcdir/tmp-pem.pem |grep -v "Not After:" >tmp2
++diff tmp1 tmp2
+ rc=$?
+ 
+ if test "$rc" != "0"; then
+@@ -69,6 +71,6 @@ if test "$rc" != "0"; then
+   exit $rc
+ fi
+ 
+-rm -f tmp-pem.pem
++rm -f tmp-pem.pem tmp1 tmp2
+ 
+ exit 0
+-- 
+1.7.1
+