Update dependencies

vendor/tailscale.com/build_dist.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env sh
+#
+# Runs `go build` with flags configured for binary distribution. All
+# it does differently from `go build` is burn git commit and version
+# information into the binaries, so that we can track down user
+# issues.
+#
+# If you're packaging Tailscale for a distro, please consider using
+# this script, or executing equivalent commands in your
+# distro-specific build system.
+
+set -eu
+
+go="go"
+if [ -n "${TS_USE_TOOLCHAIN:-}" ]; then
+	go="./tool/go"
+fi
+
+eval `CGO_ENABLED=0 GOOS=$($go env GOHOSTOS) GOARCH=$($go env GOHOSTARCH) $go run ./cmd/mkversion`
+
+if [ "$1" = "shellvars" ]; then
+	cat <<EOF
+VERSION_MINOR="$VERSION_MINOR"
+VERSION_SHORT="$VERSION_SHORT"
+VERSION_LONG="$VERSION_LONG"
+VERSION_GIT_HASH="$VERSION_GIT_HASH"
+EOF
+	exit 0
+fi
+
+tags=""
+ldflags="-X tailscale.com/version.longStamp=${VERSION_LONG} -X tailscale.com/version.shortStamp=${VERSION_SHORT}"
+
+# build_dist.sh arguments must precede go build arguments.
+while [ "$#" -gt 1 ]; do
+	case "$1" in
+	--extra-small)
+		shift
+		ldflags="$ldflags -w -s"
+		tags="${tags:+$tags,}ts_omit_aws,ts_omit_bird,ts_omit_tap,ts_omit_kube,ts_omit_completion"
+		;;
+	--box)
+		shift
+		tags="${tags:+$tags,}ts_include_cli"
+		;;
+	*)
+		break
+		;;
+	esac
+done
+
+exec $go build ${tags:+-tags=$tags} -ldflags "$ldflags" "$@"