gnu: lksctp-tools: Fix build of include file.

* gnu/packages/patches/lksctp-tools-1.0.18-fix-header-file-name.patch:
  New file.
* gnu/local.mk[patches]: Add it.
* gnu/packages/networking.scm(/lksctp-tools)[source]: Use this patch.

gnu/local.mk

@@ -1266,6 +1266,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/libffi-float128-powerpc64le.patch	\
   %D%/packages/patches/libvirt-add-install-prefix.patch	\
   %D%/packages/patches/libziparchive-add-includes.patch		\
+  %D%/packages/patches/lksctp-tools-1.0.18-fix-header-file-name.patch \
   %D%/packages/patches/localed-xorg-keyboard.patch		\
   %D%/packages/patches/kdiagram-Fix-missing-link-libraries.patch \
   %D%/packages/patches/kiki-level-selection-crash.patch		\

gnu/packages/networking.scm

@@ -448,6 +448,8 @@ performance across unpredictable networks, such as the Internet.")
          (url "https://github.com/sctp/lksctp-tools")
          (commit (string-append "v" version))))
        (file-name (git-file-name name version))
+       (patches
+        (search-patches "lksctp-tools-1.0.18-fix-header-file-name.patch"))
        (sha256
         (base32 "1x4fwzrlzvfa3vcpja97m8w5g9ir2zrh4zs7zksminrnmdrs0dsr"))))
     (build-system gnu-build-system)

gnu/packages/patches/lksctp-tools-1.0.18-fix-header-file-name.patch

@@ -0,0 +1,32 @@
+From 378560050a8f93786c590cc99a55461666205b61 Mon Sep 17 00:00:00 2001
+From: Xin Long <lucien.xin@gmail.com>
+Date: Fri, 24 Aug 2018 01:13:32 +0800
+Subject: [PATCH] build: fix netinet/sctp.h not to be installed
+
+After libcnetinet_HEADERS was set to sctp.h.in, netinet/sctp.h can
+no longer be installed into ${includedir}.
+
+Since "AC_CONFIG_HEADERS([src/include/netinet/sctp.h])" is already
+added into configure.ac, there's no need to generate sctp.h by
+automake.
+
+So we simply set libcnetinet_HEADERS back to sctp.h.
+
+Fixes: 9607dd85e70a ("netinet/sctp.h: dynamically build based on system setup")
+Signed-off-by: Xin Long <lucien.xin@gmail.com>
+Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
+---
+ src/include/netinet/Makefile.am | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/src/include/netinet/Makefile.am b/src/include/netinet/Makefile.am
+index ca0aac2..965db8c 100644
+--- a/src/include/netinet/Makefile.am
++++ b/src/include/netinet/Makefile.am
+@@ -11,5 +11,4 @@ libcnetinetdir = $(includedir)/netinet
+ # API.
+ include_HEADERS =
+ 
+-libcnetinet_HEADERS = sctp.h.in
+-BUILT_SOURCES = sctp.h
++libcnetinet_HEADERS = sctp.h