Initial QSfera import

Server/vendor/github.com/dgraph-io/ristretto/z/calloc_32bit.go

@@ -0,0 +1,14 @@
+// Copyright 2020 The LevelDB-Go and Pebble Authors. All rights reserved. Use
+// of this source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+
+// +build 386 amd64p32 arm armbe  mips mipsle mips64p32 mips64p32le ppc sparc
+
+package z
+
+const (
+	// MaxArrayLen is a safe maximum length for slices on this architecture.
+	MaxArrayLen = 1<<31 - 1
+	// MaxBufferSize is the size of virtually unlimited buffer on this architecture.
+	MaxBufferSize = 1 << 30
+)