tn5250: add license information

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/tn5250/tn5250.mk

@@ -8,6 +8,8 @@ TN5250_VERSION = 0.17.4
 TN5250_SITE = http://downloads.sourceforge.net/project/tn5250/tn5250/$(TN5250_VERSION)
 TN5250_MAKE_OPT = CPPFLAGS=""
 TN5250_DEPENDENCIES = ncurses
+TN5250_LICENSE = LGPLv2.1+
+TN5250_LICENSE_FILES = COPYING
 
 ifeq ($(BR2_PACKAGE_OPENSSL),y)
 	TN5250_CONF_OPT += --with-ssl