chore: better workflow

.github/release-cgo.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+BRANCH=$(git branch --show-current)
+if [ "$BRANCH" = "Alpha" ];then
+  VERSION=alpha-$(git rev-parse --short HEAD)
+elif [ "$BRANCH" = "Beta" ]; then
+VERSION=beta-$(git rev-parse --short HEAD)
+elif [ "$BRANCH" = "" ]; then
+VERSION=$(git describe --tags)
+else
+VERSION=$(git rev-parse --short HEAD)
+fi
+
+xgoTarget=windows/*,linux/*,darwin-10.16/*
+xgoTags=with_gvisor,with_lwip
+Ldflags="-X 'github.com/Dreamacro/clash/constant.Version=${VERSION}' -X 'github.com/Dreamacro/clash/constant.BuildTime=${BUILDTIME}' -w -s -buildid="
+
+xgo  --branch ${BRANCH} --out=${BINDIR}/${NAME} --targets="${xgoTarget}" --tags="${xgoTags}" -ldflags="${Ldflags}" github.com/${REPO}