nftables: Update to latest snaphot (20190622).

Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>

nftables/nftables.nm

@@ -5,7 +5,9 @@
 
 name       = nftables
 version    = 0.9.0
-release    = 1
+snapshot   = 20190622
+release    = 1.%{snapshot}
+thisapp    = %{name}-%{snapshot}
 
 groups     = Networking/Tools
 url        = http://netfilter.org/projects/nftables/
@@ -16,12 +18,15 @@ description
 	%{summary}
 end
 
-source_dl  = http://ftp.netfilter.org/pub/nftables/
+source_dl  = http://ftp.netfilter.org/pub/nftables/snapshot/
 sources    = %{thisapp}.tar.bz2
 
 build
 	requires
+		asciidoc
+		autoconf
 		autogen
+		automake
 		bison
 		docbook2X
 		docbook-xsl
@@ -32,6 +37,10 @@ build
 		libnftnl-devel >= 1.0.5
 		readline-devel
 	end
+
+	prepare_cmds
+		./autogen.sh
+	end
 end
 
 packages