buildroot

package/ipsec-tools: allow autoreconf

Upstream release is broken w.r.t autoreconf, patch 0002 fixes it.
Needed to prepare for upcoming patch to fix linking against newer
flex versions.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>