package/iputils: fix build with nettle

Fixes:
 - http://autobuild.buildroot.org/results/e86555090e27b631ba35214ef100aa9331844684

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Acked-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/iputils/0001-ninfod-ninfod_name.c-fix-build-with-nettle.patch

@@ -0,0 +1,38 @@
+From f209ebb91e65980bcdddce8cc12b00ec11623f76 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Tue, 21 May 2019 19:14:18 +0200
+Subject: [PATCH] ninfod/ninfod_name.c: fix build with nettle
+
+Build of ninfod with nettle fails on:
+/home/test/autobuild/run/instance-1/output/host/bin/mips64el-linux-gcc  -o ninfod/ninfod 'ninfod/0cb6efe@@ninfod@exe/ni_ifaddrs.c.o' 'ninfod/0cb6efe@@ninfod@exe/ninfod.c.o' 'ninfod/0cb6efe@@ninfod@exe/ninfod_addrs.c.o' 'ninfod/0cb6efe@@ninfod@exe/ninfod_core.c.o' 'ninfod/0cb6efe@@ninfod@exe/ninfod_name.c.o' -Wl,--no-undefined -Wl,--as-needed -Wl,-O1 -Wl,--start-group libcommon.a -lcap /home/test/autobuild/run/instance-1/output/host/usr/bin/../mips64el-buildroot-linux-uclibc/sysroot/usr/lib/libnettle.so -Wl,--end-group -pthread '-Wl,-rpath,$ORIGIN/..:/home/test/autobuild/run/instance-1/output/host/usr/bin/../mips64el-buildroot-linux-uclibc/sysroot/usr/lib' -Wl,-rpath-link,/home/test/autobuild/run/instance-1/output/build/iputils-s20190515/build/:/home/test/autobuild/run/instance-1/output/host/usr/bin/../mips64el-buildroot-linux-uclibc/sysroot/usr/lib
+ninfod/0cb6efe@@ninfod@exe/ninfod_name.c.o: In function `init_nodeinfo_nodename':
+ninfod_name.c:(.text+0x378): undefined reference to `MD5_Init'
+
+This error is raised because MD5_Init is not defined by nettle.
+To fix this error, include iputils_md5dig.h if USE_NETTLE is defined.
+
+Fixes:
+ - http://autobuild.buildroot.org/results/e86555090e27b631ba35214ef100aa9331844684
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://github.com/iputils/iputils/pull/181]
+---
+ ninfod/ninfod_name.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/ninfod/ninfod_name.c b/ninfod/ninfod_name.c
+index daf606d..525c93d 100644
+--- a/ninfod/ninfod_name.c
++++ b/ninfod/ninfod_name.c
+@@ -95,7 +95,7 @@
+ 
+ #include <arpa/inet.h>
+ 
+-#if defined(HAVE_GCRYPT_H) || defined(USE_KERNEL_CRYPTO_API)
++#if defined(HAVE_GCRYPT_H) || defined(USE_KERNEL_CRYPTO_API) || defined(USE_NETTLE)
+ # include "iputils_md5dig.h"
+ #elif defined(HAVE_GNUTLS_OPENSSL_H)
+ # include <gnutls/openssl.h>
+-- 
+2.20.1
+