synergy: add license information

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/synergy/synergy.mk

@@ -6,12 +6,12 @@
 
 SYNERGY_VERSION = 1.3.1
 SYNERGY_SITE = http://downloads.sourceforge.net/project/synergy2/Sources/$(SYNERGY_VERSION)
-
 SYNERGY_AUTORECONF = YES
 SYNERGY_CONF_OPT = --x-includes=$(STAGING_DIR)/usr/include/X11 \
                    --x-libraries=$(STAGING_DIR)/usr/lib
-
 SYNERGY_DEPENDENCIES = xlib_libXtst \
 		$(if $(BR2_PACKAGE_XLIB_LIBXINERAMA),xlib_libXinerama)
+SYNERGY_LICENSE = GPLv2
+SYNERGY_LICENSE_FILES = COPYING
 
 $(eval $(autotools-package))