muninlite: Add PKG_LICENSE information

Signed-off-by: Ian Leonard <antonlacon@gmail.com>

admin/muninlite/Makefile

@@ -14,6 +14,8 @@ PKG_RELEASE:=5
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=@SF/$(PKG_NAME)
 PKG_MD5SUM:=a8cc86f0cc536a6c22dc298f4ed55339
+PKG_LICENSE:=GPL-2.0
+PKG_LICENSE_FILES:=LICENSE
 
 include $(INCLUDE_DIR)/package.mk