[iptables PATCH v2] build: Fix error during out of tree build

[Ben Brown <ben@xxxxxxxxxxx>]

Fixes the following error:

    ../../libxtables/xtables.c:52:10: fatal error: libiptc/linux_list.h: No such file or directory
       52 | #include <libiptc/linux_list.h>

Fixes: f58b0d7406451 ("libxtables: Implement notargets hash table")

Signed-off-by: Ben Brown <ben@xxxxxxxxxxx>
---
 libxtables/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libxtables/Makefile.am b/libxtables/Makefile.am
index 8ff6b0ca..3bfded85 100644
--- a/libxtables/Makefile.am
+++ b/libxtables/Makefile.am
@@ -1,7 +1,7 @@
 # -*- Makefile -*-
 
 AM_CFLAGS   = ${regular_CFLAGS}
-AM_CPPFLAGS = ${regular_CPPFLAGS} -I${top_builddir}/include -I${top_srcdir}/include -I${top_srcdir}/iptables ${kinclude_CPPFLAGS}
+AM_CPPFLAGS = ${regular_CPPFLAGS} -I${top_builddir}/include -I${top_srcdir}/include -I${top_srcdir}/iptables -I${top_srcdir} ${kinclude_CPPFLAGS}
 
 lib_LTLIBRARIES       = libxtables.la
 libxtables_la_SOURCES = xtables.c xtoptions.c getethertype.c
-- 
2.36.1