busybox: add license info

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

package/busybox/busybox.mk

@@ -12,6 +12,9 @@ BUSYBOX_VERSION = $(call qstrip,$(BR2_BUSYBOX_VERSION))
 BUSYBOX_SITE = http://www.busybox.net/downloads
 endif
 BUSYBOX_SOURCE = busybox-$(BUSYBOX_VERSION).tar.bz2
+BUSYBOX_LICENSE = GPLv2
+BUSYBOX_LICENSE_FILES = LICENSE
+
 BUSYBOX_BUILD_CONFIG = $(BUSYBOX_DIR)/.config
 # Allows the build system to tweak CFLAGS
 BUSYBOX_MAKE_ENV = $(TARGET_MAKE_ENV) CFLAGS="$(TARGET_CFLAGS) -I$(LINUX_HEADERS_DIR)/include"