pulseaudio: add PKG_LICENSE information

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

sound/pulseaudio/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2011 OpenWrt.org
+# Copyright (C) 2011-2014 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -14,6 +14,8 @@ PKG_RELEASE:=1
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=http://freedesktop.org/software/pulseaudio/releases/
 PKG_MD5SUM:=c43749838612f4860465e83ed62ca38e
+PKG_LICENSE:=LGPL-2.1+
+PKG_LICENSE_FILES:=GPL LICENSE
 
 PKG_BUILD_DIR=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
 PKG_BUILD_DEPENDS:=intltool/host