socat: Fix build with musl

NETDB_INTERNAL is a glibc define

(From OE-Core rev: eb513884519804b3b8d600eeb7aadf3ec54e0345)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/socat/socat/0001-define-NETDB_INTERNAL-to-1-if-not-available.patch

@@ -0,0 +1,32 @@
+From e6a7d96fa3675bdd3f4d7a3d7682381789eef22f Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Mon, 15 Feb 2016 20:25:34 +0000
+Subject: [PATCH] define NETDB_INTERNAL to -1 if not available
+
+helps build with musl
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+Upstream-Status: Pending
+
+ compat.h | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/compat.h b/compat.h
+index c8bee4d..bfb013a 100644
+--- a/compat.h
++++ b/compat.h
+@@ -666,6 +666,10 @@ typedef int sig_atomic_t;
+ #  define NETDB_INTERNAL h_NETDB_INTERNAL
+ #endif
+ 
++#if !defined(NETDB_INTERNAL)
++#  define NETDB_INTERNAL (-1)
++#endif
++
+ #ifndef INET_ADDRSTRLEN
+ #  define INET_ADDRSTRLEN sizeof(struct sockaddr_in)
+ #endif
+-- 
+2.7.1
+

meta/recipes-connectivity/socat/socat_1.7.3.1.bb

@@ -14,6 +14,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263 \
 
 SRC_URI = "http://www.dest-unreach.org/socat/download/socat-${PV}.tar.bz2 \
            file://Makefile.in-fix-for-parallel-build.patch \
+           file://0001-define-NETDB_INTERNAL-to-1-if-not-available.patch \
 "
 
 SRC_URI[md5sum] = "334e46924f2b386299c9db2ac22bcd36"