Improved iproute2 to install libnetlink and related header files by default

network/iproute2/iproute2.conf

@@ -31,6 +31,10 @@ iproute2_extract() {
 }
 
 iproute2_postmake() {
+	# libnetlink and related header files are not installed by default
+	cp lib/libnetlink.a $root/$libdir/
+	cp include/{libnetlink.h,ll_map.h} $root/$includedir/
+
 	$CC $confdir/ipnm2nwbc.c -o $root/$sbindir/ipnm2nwbc
 	cp $confdir/dumpnetcfg.sh $root/$sbindir/dumpnetcfg
 	chmod +x $root/$sbindir/dumpnetcfg