xloader: add license information

Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

boot/xloader/xloader.mk

@@ -7,6 +7,9 @@ XLOADER_VERSION    = 6f3a26101303051e0f91b6213735b68ce804e94e
 XLOADER_SITE       = git://gitorious.org/x-loader/x-loader.git
 XLOADER_BOARD_NAME = $(call qstrip,$(BR2_TARGET_XLOADER_BOARDNAME))
 
+XLOADER_LICENSE = GPLv2+
+XLOADER_LICENSE_FILES = README
+
 XLOADER_INSTALL_IMAGES = YES
 
 define XLOADER_BUILD_CMDS