gn编译失败，原因：gn-2025-09-18-81b24e01.tar.xz 下载失败 #1800
Description
编译平台：Ubuntu 22.04
尝试不同设备编译都卡在gn编译失败上面，开了v=s调试模式，显示gn-2025-09-18-81b24e01.tar.xz 下载失败，看了gn的makefile，源码里面也是写着要下载这个09-18的版本，难道这个09-18的版本现在不存在了吗？
2025-10-01T15:39:26.1067684Z SHELL= flock /workdir/openwrt/tmp/.gn-2025-09-18-81b24e01.tar.xz.flock -c ' /workdir/openwrt/scripts/download.pl "/workdir/openwrt/dl" "gn-2025-09-18-81b24e01.tar.xz" "833371c2e8e19a2705f6c9c89b9c7514ec0f4a466a818b6b8063d7dbfc846d4b" "" || ( echo "Checking out files from the git repository..."; mkdir -p /workdir/openwrt/tmp/dl && cd /workdir/openwrt/tmp/dl && rm -rf gn-2025-09-18-81b24e01 && [ ! -d gn-2025-09-18-81b24e01 ] && git clone https://gn.googlesource.com/gn.git gn-2025-09-18-81b24e01 && (cd gn-2025-09-18-81b24e01 && git checkout 81b24e01531ecf0eff12ec9359a555ec3944ec4e && git submodule update --init --recursive) && echo "Packing checkout..." && export TAR_TIMESTAMP=cd gn-2025-09-18-81b24e01 && git log -1 --format='\''@%ct'\'' && rm -rf gn-2025-09-18-81b24e01/.git && tar --numeric-owner --owner=0 --group=0 --mode=a-s --sort=name ${TAR_TIMESTAMP:+--mtime="$TAR_TIMESTAMP"} -c gn-2025-09-18-81b24e01 | xz -zc -7e > /workdir/openwrt/tmp/dl/gn-2025-09-18-81b24e01.tar.xz && mv /workdir/openwrt/tmp/dl/gn-2025-09-18-81b24e01.tar.xz /workdir/openwrt/dl/ && rm -rf gn-2025-09-18-81b24e01; ) '
2025-10-01T15:39:26.1346059Z + curl -f --connect-timeout 20 --retry 5 --location https://sources.cdn.openwrt.org/gn-2025-09-18-81b24e01.tar.xz
2025-10-01T15:39:26.1404147Z % Total % Received % Xferd Average Speed Time Time Time Current
2025-10-01T15:39:26.1404642Z Dload Upload Total Spent Left Speed
2025-10-01T15:39:26.1404882Z
2025-10-01T15:39:26.6064168Z 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
2025-10-01T15:39:26.6064807Z 0 146 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
2025-10-01T15:39:26.6065423Z curl: (22) The requested URL returned error: 404
2025-10-01T15:39:26.6096584Z Download failed.
2025-10-01T15:39:26.6098278Z + curl -f --connect-timeout 20 --retry 5 --location https://sources.openwrt.org/gn-2025-09-18-81b24e01.tar.xz
2025-10-01T15:39:26.6157269Z % Total % Received % Xferd Average Speed Time Time Time Current
2025-10-01T15:39:26.6157927Z Dload Upload Total Spent Left Speed
2025-10-01T15:39:26.6158208Z
2025-10-01T15:39:26.9362619Z 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
2025-10-01T15:39:27.0272393Z 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
2025-10-01T15:39:27.0272924Z 0 146 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
2025-10-01T15:39:27.0283986Z curl: (22) The requested URL returned error: 404
2025-10-01T15:39:27.0306167Z Download failed.
2025-10-01T15:39:27.0307929Z + curl -f --connect-timeout 20 --retry 5 --location https://mirror2.openwrt.org/sources/gn-2025-09-18-81b24e01.tar.xz
2025-10-01T15:39:27.0363259Z % Total % Received % Xferd Average Speed Time Time Time Current
2025-10-01T15:39:27.0364236Z Dload Upload Total Spent Left Speed
2025-10-01T15:39:27.0364608Z
2025-10-01T15:39:27.3858530Z 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
2025-10-01T15:39:27.3859288Z 0 153 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
2025-10-01T15:39:27.3869034Z curl: (22) The requested URL returned error: 404
2025-10-01T15:39:27.3888595Z Download failed.
2025-10-01T15:39:27.3889489Z No more mirrors to try - giving up.