Fix build on Solaris.

Solaris has no SOL_TCP, but TCP_CORK.

devel/distcc/distinfo

@@ -1,4 +1,4 @@
-$NetBSD: distinfo,v 1.18 2009/01/17 13:27:48 adam Exp $
+$NetBSD: distinfo,v 1.19 2012/12/24 13:45:02 ryoon Exp $
 
 SHA1 (distcc-3.1.tar.bz2) = 30663e8ff94f13c0553fbfb928adba91814e1b3a
 RMD160 (distcc-3.1.tar.bz2) = 82229c230e6917b0df7db275460579b02dbf6b60
@@ -8,3 +8,4 @@ SHA1 (patch-ab) = c3a306be0a3576b33f506bd6516d8242ceec07ca
 SHA1 (patch-ac) = 618015e2954dc54c6db3712381749feb17106647
 SHA1 (patch-ad) = 79ce3ea1b7dd75dce1654dd31eaa372174f8f5d1
 SHA1 (patch-ae) = d4e5eba767f08a1c346c0223ddf88e98a5ed7c59
+SHA1 (patch-src_io.c) = 5c662a4f9af20b5cffbd6285a3b0d6d6c4066571

devel/distcc/patches/patch-src_io.c

@@ -0,0 +1,13 @@
+$NetBSD: patch-src_io.c,v 1.1 2012/12/24 13:45:02 ryoon Exp $
+
+--- src/io.c.orig	2008-12-02 21:50:25.000000000 +0000
++++ src/io.c
+@@ -242,7 +242,7 @@ int dcc_writex(int fd, const void *buf, 
+  **/
+ int tcp_cork_sock(int POSSIBLY_UNUSED(fd), int POSSIBLY_UNUSED(corked))
+ {
+-#ifdef TCP_CORK
++#if defined(TCP_CORK) && defined(SOL_TCP)
+     if (!dcc_getenv_bool("DISTCC_TCP_CORK", 1))
+         return 0;
+