message: Fix platform_posix.cc on FreeBSD
diff: #include "utils.h"
  -#include <loguru.hpp>
  +#include "loguru.hpp"
  #include <pthread.h>
  -#include <cassert>
  -#include <iostream>
  -#include <string>
  +#if defined(__FreeBSD__)
  +# include <pthread_np.h>
  +# include <sys/thr.h>
  +#elif defined(__OpenBSD__)
  +# include <pthread_np.h>
  +#endif
  #include <assert.h>
  #include <errno.h>
  #include <errno.h>
  #include <fcntl.h>
  -#include <unistd.h>
  #include <semaphore.h>
  #include <sys/mman.h>
  #include <malloc.h>
  #endif
  +#include <iostream>
  +#include <string>
  +
  namespace {
  // Returns the canonicalized absolute pathname, without expanding symbolic
  