message: rng/realrandomvalue: simplify checking for linux
diff: @@ -49,7 +49,7 @@ public:
  CryptGenRandom(hCryptProv, 8, pbData);
  unsigned int v = *((unsigned int *)&pbData) | 1;
  return v;
  -#elif defined(linux) || defined(__linux__) || defined(__APPLE__)
  +#elif defined(__linux) || defined(__APPLE__)
  // Pull random values out of /dev/urandom.
  unsigned int v;
  