Chore: update build

Makefile

@@ -1,6 +1,6 @@
 NAME=clash
 BINDIR=bin
-VERSION=$(shell git describe --tags --always 2>/dev/null ||  date +%F)
+VERSION=$(shell git describe --tags --always 2>/dev/null || echo "unknown version")
 BUILDTIME=$(shell date -u)
 GOBUILD=CGO_ENABLED=0 go build -trimpath -ldflags '-X "github.com/Dreamacro/clash/constant.Version=$(VERSION)" \
 		-X "github.com/Dreamacro/clash/constant.BuildTime=$(BUILDTIME)" \
@@ -16,7 +16,7 @@ PLATFORM_LIST = \
 	linux-armv5 \
 	linux-armv6 \
 	linux-armv7 \
-	linux-arm64 \
+	linux-armv8 \
 	linux-mips-softfloat \
 	linux-mips-hardfloat \
 	linux-mipsle-softfloat \
@@ -67,7 +67,7 @@ linux-armv6:
 linux-armv7:
 	GOARCH=arm GOOS=linux GOARM=7 $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
 
-linux-arm64:
+linux-armv8:
 	GOARCH=arm64 GOOS=linux $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
 
 linux-mips-softfloat: