ifplugd: add license info

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

package/ifplugd/ifplugd.mk

@@ -6,7 +6,10 @@
 
 IFPLUGD_VERSION = 0.28
 IFPLUGD_SITE = http://0pointer.de/lennart/projects/ifplugd
+IFPLUGD_LICENSE = GPLv2
+IFPLUGD_LICENSE_FILES = LICENSE
 IFPLUGD_AUTORECONF = YES
+
 # install-strip unconditionally overwrites $(TARGET_DIR)/etc/ifplugd/ifplugd.*
 IFPLUGD_INSTALL_TARGET_OPT = DESTDIR=$(TARGET_DIR) install-exec
 IFPLUGD_CONF_OPT = --disable-lynx