libnfc: add license information

Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
diff --git a/package/libnfc/libnfc.mk b/package/libnfc/libnfc.mk
index ab062bb..08892b3 100644
--- a/package/libnfc/libnfc.mk
+++ b/package/libnfc/libnfc.mk
@@ -6,6 +6,8 @@
 LIBNFC_VERSION = 1446
 LIBNFC_SITE = http://libnfc.googlecode.com/svn/trunk/
 LIBNFC_SITE_METHOD = svn
+LIBNFC_LICENSE = LGPLv3+
+LIBNFC_LICENSE_FILES = COPYING
 LIBNFC_AUTORECONF = YES
 LIBNFC_INSTALL_STAGING = YES