directfb: define license

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/directfb/directfb.mk

@@ -7,6 +7,8 @@ DIRECTFB_VERSION_MAJOR = 1.4
 DIRECTFB_VERSION = $(DIRECTFB_VERSION_MAJOR).16
 DIRECTFB_SITE = http://www.directfb.org/downloads/Core/DirectFB-$(DIRECTFB_VERSION_MAJOR)
 DIRECTFB_SOURCE = DirectFB-$(DIRECTFB_VERSION).tar.gz
+DIRECTFB_LICENSE = LGPLv2.1+
+DIRECTFB_LICENSE_FILES = COPYING
 DIRECTFB_AUTORECONF = YES
 DIRECTFB_INSTALL_STAGING = YES
 DIRECTFB_CONF_OPT = \