[openwrt/openwrt] opkg: use $(PROJECT_GIT), $(AUTORELEASE) and SPDX

[LEDE Commits]

aparcar pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/6687a2483a091990a803aadad5637b2f6a8e69c1

commit 6687a2483a091990a803aadad5637b2f6a8e69c1
Author: Nick Hainke <vincent at systemli.org>
AuthorDate: Wed May 19 22:39:35 2021 +0200

    opkg: use $(PROJECT_GIT), $(AUTORELEASE) and SPDX
    
    1) Use SPDX license headers to be machine readable.
    2) Update copyright to 2021.
    3) Use $(PROJECT_GIT) instead of manually specifying the git url.
    4) Use $(AUTORELEASE) to automatically set the correct PKG_RELEASE.
    
    Signed-off-by: Nick Hainke <vincent at systemli.org>
---
 package/system/opkg/Makefile | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/package/system/opkg/Makefile b/package/system/opkg/Makefile
index fb7d8667c6..99234978a1 100644
--- a/package/system/opkg/Makefile
+++ b/package/system/opkg/Makefile
@@ -1,19 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
 #
-# Copyright (C) 2006-2015 OpenWrt.org
-# Copyright (C) 2016-2017 LEDE Project
+# Copyright (C) 2006-2021 OpenWrt.org
 #
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
 
 include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=opkg
-PKG_RELEASE:=1
+PKG_RELEASE:=$(AUTORELEASE)
 PKG_FLAGS:=essential
 
 PKG_SOURCE_PROTO:=git
-PKG_SOURCE_URL:=https://git.openwrt.org/project/opkg-lede.git
+PKG_SOURCE_URL:=$(PROJECT_GIT)/project/opkg-lede.git
 PKG_SOURCE_DATE:=2021-03-15
 PKG_SOURCE_VERSION:=5936c4f9660248284e8a9b040ea3153d3ea888de
 PKG_MIRROR_HASH:=b873c209baaf4f150c89646d58e4a0072f807d24b02c320ab8c7ae9180c13240