libdnet: add license info

Signed-off-by: Danomi Manchego <danomimanchego123@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libdnet/libdnet.mk

@@ -7,6 +7,8 @@
 LIBDNET_VERSION = 1.11
 LIBDNET_SOURCE = libdnet-$(LIBDNET_VERSION).tar.gz
 LIBDNET_SITE = http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/libdnet/
+LIBDNET_LICENSE = BSD-3c
+LIBDNET_LICENSE_FILES = LICENSE
 LIBDNET_INSTALL_STAGING = YES
 LIBDNET_AUTORECONF = YES
 LIBDNET_CONF_OPT = \