dbus: add license information

Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/dbus/dbus.mk

@@ -3,8 +3,11 @@
 # dbus
 #
 #############################################################
+
 DBUS_VERSION = 1.4.24
 DBUS_SITE = http://dbus.freedesktop.org/releases/dbus/
+DBUS_LICENSE = AFLv2.1 GPLv2+
+DBUS_LICENSE_FILES = COPYING
 DBUS_INSTALL_STAGING = YES
 
 DBUS_DEPENDENCIES = host-pkgconf