message: Fix missing modules in Redox platform
diff: @@ -12,6 +12,9 @@ use syscall::{self, Result};
  use {c_str, errno, FileReader, FileWriter, Pal, RawFile, Read};
  use types::*;
  +mod signal;
  +mod socket;
  +
  const EINVAL: c_int = 22;
  const ENOSYS: c_int = 38;
  const MAP_ANON: c_int = 1;
  