gnu: librsvg: Fix tests.

GLib doesn't allow duplicate test case paths any more.

* gnu/packages/patches/librsvg-tests.patch: New file.
* gnu/packages/gnome.scm (librsvg)[source]: Add patch.
* gnu-system.am (dist_patch_DATA): Add it.

gnu-system.am

@@ -527,6 +527,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/libmad-armv7-thumb-pt2.patch		\
   gnu/packages/patches/libmad-frame-length.patch		\
   gnu/packages/patches/libmad-mips-newgcc.patch			\
+  gnu/packages/patches/librsvg-tests.patch			\
   gnu/packages/patches/libtheora-config-guess.patch		\
   gnu/packages/patches/libtool-skip-tests2.patch		\
   gnu/packages/patches/libssh-CVE-2014-0017.patch		\

gnu/packages/gnome.scm

@@ -829,7 +829,9 @@ (define-public librsvg
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "00ifd9wjjjsw0ybk5j6qs4yyh66jj34hjmggy6dhrgfy8ksw06k1"))))
+                "00ifd9wjjjsw0ybk5j6qs4yyh66jj34hjmggy6dhrgfy8ksw06k1"))
+              (patches
+               (list (search-patch "librsvg-tests.patch")))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases

gnu/packages/patches/librsvg-tests.patch

@@ -0,0 +1,27 @@
+From e06fc71a57156123e4e50a39957100a651ab632b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=E5=AE=8B=E6=96=87=E6=AD=A6?= <iyzsong@gmail.com>
+Date: Sat, 17 Oct 2015 10:20:33 +0800
+Subject: [PATCH] tests/styles: Don't duplicate test names.
+
+---
+ tests/styles.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/tests/styles.c b/tests/styles.c
+index d09b1f2..a938835 100644
+--- a/tests/styles.c
++++ b/tests/styles.c
+@@ -97,8 +97,8 @@ static const FixtureData fixtures[] =
+     {"/styles/selectors/2 or more selectors (stroke)", "592207", "styles/bug592207.svg", "#target", "stroke", .expected.color = 0xff0000ff},
+     {"/styles/svg-element-style", "615701", "styles/svg-class.svg", "#svg", "fill", .expected.color = 0xff0000ff},
+     {"/styles/presentation attribute in svg element", "620693", "styles/bug620693.svg", "#svg", "stroke", .expected.color = 0xffff0000},
+-    {"/styles/!important", "379629", "styles/bug379629.svg", "#base_shadow", "stroke", .expected.color = 0xffffc0cb /* pink */},
+-    {"/styles/!important", "379629", "styles/bug379629.svg", "#base_shadow", "stroke-width", .expected.length = {POINTS_LENGTH(5.), 'i'}},
++    {"/styles/!important/1", "379629", "styles/bug379629.svg", "#base_shadow", "stroke", .expected.color = 0xffffc0cb /* pink */},
++    {"/styles/!important/2", "379629", "styles/bug379629.svg", "#base_shadow", "stroke-width", .expected.length = {POINTS_LENGTH(5.), 'i'}},
+     {"/styles/!important/class", "614606", "styles/bug614606.svg", "#path6306", "fill", .expected.color = 0xffff0000 /* red */ },
+     {"/styles/!important/element", "614606", "styles/bug614606.svg", "#path6308", "fill", .expected.color = 0xff000000},
+     {"/styles/!important/#id prior than class", NULL, "styles/important.svg", "#red", "fill", .expected.color = 0xffff0000 },
+-- 
+2.5.0
+