[openwrt/openwrt] libnetfilter-conntrack: backport patch fixing compilation with 5.15

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/4393d8c0902233a2808577abc42b4ce2083a5832

commit 4393d8c0902233a2808577abc42b4ce2083a5832
Author: Ansuel Smith <ansuelsmth at gmail.com>
AuthorDate: Wed Mar 2 15:38:59 2022 +0100

    libnetfilter-conntrack: backport patch fixing compilation with 5.15
    
    Backport patch fixing compilation with 5.15 and musl provided by Robert Marko
    
    Signed-off-by: Ansuel Smith <ansuelsmth at gmail.com>
---
 package/libs/libnetfilter-conntrack/Makefile       |  2 +-
 ...track-fix-build-with-kernel-5_15-and-musl.patch | 49 ++++++++++++++++++++++
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/package/libs/libnetfilter-conntrack/Makefile b/package/libs/libnetfilter-conntrack/Makefile
index 0cfb19f197..50432e9cd8 100644
--- a/package/libs/libnetfilter-conntrack/Makefile
+++ b/package/libs/libnetfilter-conntrack/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libnetfilter_conntrack
 PKG_VERSION:=1.0.9
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://www.netfilter.org/projects/libnetfilter_conntrack/files
diff --git a/package/libs/libnetfilter-conntrack/patches/0001-conntrack-fix-build-with-kernel-5_15-and-musl.patch b/package/libs/libnetfilter-conntrack/patches/0001-conntrack-fix-build-with-kernel-5_15-and-musl.patch
new file mode 100644
index 0000000000..d04f4b5e42
--- /dev/null
+++ b/package/libs/libnetfilter-conntrack/patches/0001-conntrack-fix-build-with-kernel-5_15-and-musl.patch
@@ -0,0 +1,49 @@
+From 21ee35dde73aec5eba35290587d479218c6dd824 Mon Sep 17 00:00:00 2001
+From: Robert Marko <robimarko at gmail.com>
+Date: Thu, 24 Feb 2022 15:01:11 +0100
+Subject: conntrack: fix build with kernel 5.15 and musl
+
+Currently, with kernel 5.15 headers and musl building is failing with
+redefinition errors due to a conflict between the kernel and musl headers.
+
+Musl is able to suppres the conflicting kernel header definitions if they
+are included after the standard libc ones, however since ICMP definitions
+were moved into a separate internal header to avoid duplication this has
+stopped working and is breaking the builds.
+
+It seems that the issue is that <netinet/in.h> which contains the UAPI
+suppression defines is included in the internal.h header and not in the
+proto.h which actually includes the kernel ICMP headers and thus UAPI
+supression defines are not present.
+
+Solve this by moving the <netinet/in.h> include before the ICMP kernel
+includes in the proto.h
+
+Fixes: bc1cb4b11403 ("conntrack: Move icmp request>reply type mapping to common file")
+Signed-off-by: Robert Marko <robimarko at gmail.com>
+Signed-off-by: Florian Westphal <fw at strlen.de>
+---
+ include/internal/internal.h | 1 -
+ include/internal/proto.h    | 1 +
+ 2 files changed, 1 insertion(+), 1 deletion(-)
+
+--- a/include/internal/internal.h
++++ b/include/internal/internal.h
+@@ -14,7 +14,6 @@
+ #include <arpa/inet.h>
+ #include <time.h>
+ #include <errno.h>
+-#include <netinet/in.h>
+ 
+ #include <libnfnetlink/libnfnetlink.h>
+ #include <libnetfilter_conntrack/libnetfilter_conntrack.h>
+--- a/include/internal/proto.h
++++ b/include/internal/proto.h
+@@ -2,6 +2,7 @@
+ #define _NFCT_PROTO_H_
+ 
+ #include <stdint.h>
++#include <netinet/in.h>
+ #include <linux/icmp.h>
+ #include <linux/icmpv6.h>
+