pyjwt: adjust Makefile style

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

lang/python/pyjwt/Makefile

@@ -1,6 +1,4 @@
 #
-# Copyright (C) 2007-2016 OpenWrt.org
-#
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
 #
@@ -10,23 +8,27 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=pyjwt
 PKG_VERSION:=1.7.1
 PKG_RELEASE:=1
+
+PKG_MAINTAINER:=Eneas U de Queiroz <cote2004-github@yahoo.com>
 PKG_LICENSE:=MIT
+PKG_LICENSE_FILES:=LICENSE
 
 PKG_SOURCE:=PyJWT-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://files.pythonhosted.org/packages/source/P/PyJWT
 PKG_HASH:=8d59a976fb773f3e6a39c85636357c4f0e242707394cadadd9814f5cbaa20e96
+
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(BUILD_VARIANT)-PyJWT-$(PKG_VERSION)
-PKG_UNPACK=$(HOST_TAR) -C $(PKG_BUILD_DIR) --strip-components=1 -xzf $(DL_DIR)/$(PKG_SOURCE)
 
 include $(INCLUDE_DIR)/package.mk
 include ../python-package.mk
 include ../python3-package.mk
 
+PKG_UNPACK:=$(HOST_TAR) -C $(PKG_BUILD_DIR) --strip-components=1 -xzf $(DL_DIR)/$(PKG_SOURCE)
+
 define Package/python-pyjwt/Default
   SUBMENU:=Python
   SECTION:=lang
   CATEGORY:=Languages
-  MAINTAINER:=Eneas U de Queiroz <cote2004-github@yahoo.com>
   TITLE:=JSON Web Token implementation in Python
   URL:=http://github.com/jpadilla/pyjwt
 endef