package/iproute2: add upstream patch to fix musl/uclibc build

Buildroot commit 532d5561f48b6c430e7414ba5eacccf9b6c1bd22 bumped
iproute2 to version 6.17.0 which added lib/bridge.c:
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/log/lib/bridge.c?h=v6.17.0
and causes build errors on musl & uclibc toolchains.

Added upstream patch to fix the problem.

Fixes:
https://autobuild.buildroot.net/results/951/951e4198b2ba109fd9c746fe2e6316a29085aeeb/

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Reviewed-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/iproute2/0001-lib-bridge-avoid-redefinition-of-in6_addr.patch

@@ -0,0 +1,36 @@
+From 7119f3736f689ab396ca4193ac593938affd55fa Mon Sep 17 00:00:00 2001
+From: Yureka <yureka@cyberchaos.dev>
+Date: Sun, 12 Oct 2025 14:39:47 +0200
+Subject: lib: bridge: avoid redefinition of in6_addr
+
+On musl libc, which does not use the kernel definitions of in6_addr, including
+the libc headers after the kernel (UAPI) headers would cause a redefinition
+error. The opposite order avoids the redefinition.
+
+Fixes: 9e89d5b94d749f37525cd8778311e1c9f28f172a
+Signed-off-by: Yureka <yureka@cyberchaos.dev>
+
+Upstream: https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=7119f3736f689ab396ca4193ac593938affd55fa
+
+Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
+---
+ lib/bridge.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/bridge.c b/lib/bridge.c
+index 5386aa017..104f5858b 100644
+--- a/lib/bridge.c
++++ b/lib/bridge.c
+@@ -2,8 +2,8 @@
+ 
+ #include <net/if.h>
+ 
+-#include "bridge.h"
+ #include "utils.h"
++#include "bridge.h"
+ 
+ void bridge_print_vlan_flags(__u16 flags)
+ {
+-- 
+cgit 1.2.3-korg
+