Merge "Use flags = 0 to avoid fd closing for child updater process"

  // The updater in child process writes to the pipe to communicate with recovery.

  android::base::unique_fd pipe_read, pipe_write;

  if (!android::base::Pipe(&pipe_read, &pipe_write)) {

  // Explicitly disable O_CLOEXEC using 0 as the flags (last) parameter to Pipe

  // so that the child updater process will recieve a non-closed fd.

  if (!android::base::Pipe(&pipe_read, &pipe_write, 0)) {

    PLOG(ERROR) << "Failed to create pipe for updater-recovery communication";

    return INSTALL_CORRUPT;

  }