message: Fix the "dangerous use of tempnam" warning in Host/SocketTest.cpp
  instead, create a unique temporary directory, and place the socket file
  there.
diff: #include "lldb/Host/Socket.h"
  #include "lldb/Host/common/TCPSocket.h"
  #include "lldb/Host/common/UDPSocket.h"
  +#include "llvm/Support/FileSystem.h"
  +#include "llvm/Support/Path.h"
  #ifndef LLDB_DISABLE_POSIX
  #include "lldb/Host/posix/DomainSocket.h"
  @@ -41,7 +43,6 @@ public:
  protected:
  static void AcceptThread(Socket *listen_socket,
  - const char *listen_remote_address,
  bool child_processes_inherit, Socket **accept_socket,
  Status *error) {
  *error = listen_socket->Accept(*accept_socket);
  @@ -49,7 +50,7 @@ protected:
  template <typename SocketType>
  void CreateConnectedSockets(
  - const char *listen_remote_address,
  + llvm::StringRef listen_remote_address,
  const std::function<std::string(const SocketType &)> &get_connect_addr,
  std::unique_ptr<SocketType> *a_up, std::unique_ptr<SocketType> *b_up) {
  bool child_processes_inherit = false;
  @@ -64,8 +65,8 @@ protected:
  Status accept_error;
  Socket *accept_socket;
  std::thread accept_thread(AcceptThread, listen_socket_up.get(),
  - listen_remote_address, child_processes_inherit,
  - &accept_socket, &accept_error);
  + child_processes_inherit, &accept_socket,
  + &accept_error);
  std::string connect_remote_address = get_connect_addr(*listen_socket_up);
  std::unique_ptr<SocketType> connect_socket_up(
  @@ -158,15 +159,15 @@ TEST_F(SocketTest, DecodeHostAndPort) {
  #ifndef LLDB_DISABLE_POSIX
  TEST_F(SocketTest, DomainListenConnectAccept) {
  - char *file_name_str = tempnam(nullptr, nullptr);
  - EXPECT_NE(nullptr, file_name_str);
  - const std::string file_name(file_name_str);
  - free(file_name_str);
  + llvm::SmallString<64> Path;
  + std::error_code EC = llvm::sys::fs::createUniqueDirectory("DomainListenConnectAccept", Path);
  + ASSERT_FALSE(EC);
  + llvm::sys::path::append(Path, "test");
  std::unique_ptr<DomainSocket> socket_a_up;
  std::unique_ptr<DomainSocket> socket_b_up;
  CreateConnectedSockets<DomainSocket>(
  - file_name.c_str(), [=](const DomainSocket &) { return file_name; },
  + Path, [=](const DomainSocket &) { return Path.str().str(); },
  &socket_a_up, &socket_b_up);
  }
  #endif
  