Make build work for Fedorean systems

OBS-URL: https://build.opensuse.org/package/show/security:netfilter/iptables?expand=0&rev=23

iptables.spec

@@ -30,6 +30,7 @@ Summary:        IP Packet Filter Administration
 #Git-Clone:	git://git.netfilter.org/iptables
 Source:         %name-%version.tar.xz
 Patch1:         iptables-batch.patch
+Patch2:		proc-header.diff
 Url:            http://netfilter.org/
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 %if 0%{?suse_version}
@@ -58,8 +59,13 @@ These libraries are needed to compile
 - programs using libipq
 
 %prep
+%if 0%{?__xz:1}
 %setup -q
-%patch -P 1 -p1
+%else
+tar -xf "%{S:0}" --use=xz;
+%setup -DTq
+%endif
+%patch -P 1 -P 2 -p1
 
 %build
 if [ ! -e configure ]; then