fix build failed on aarch64 (#1132)

vendor/github.com/ngaut/log/crash_darwin.go

@@ -0,0 +1,18 @@
+// +build darwin
+
+package log
+
+import (
+	"log"
+	"os"
+	"syscall"
+)
+
+func CrashLog(file string) {
+	f, err := os.OpenFile(file, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0666)
+	if err != nil {
+		log.Println(err.Error())
+	} else {
+		syscall.Dup2(int(f.Fd()), 2)
+	}
+}

vendor/github.com/ngaut/log/crash_unix.go

@@ -1,4 +1,4 @@
-// +build freebsd openbsd netbsd dragonfly darwin linux
+// +build freebsd openbsd netbsd dragonfly linux
 
 package log
 
@@ -13,6 +13,6 @@ func CrashLog(file string) {
 	if err != nil {
 		log.Println(err.Error())
 	} else {
-		syscall.Dup2(int(f.Fd()), 2)
+		syscall.Dup3(int(f.Fd()), 2, 0)
 	}
 }

vendor/github.com/ngaut/log/log.go

@@ -372,7 +372,7 @@ func genHourTime(t time.Time) string {
 }
 
 func New() *logger {
-	return Newlogger(os.Stdout, "")
+	return Newlogger(os.Stderr, "")
 }
 
 func Newlogger(w io.Writer, prefix string) *logger {