TTY support about libtuv HOT 3 OPEN

@niklauslee We currently don't have plan to use tty.c in iotjs for now. So we commented out tty.c in option_unix_common.cmake.

from libtuv.

Ok. I'll try to port myself.

One more question. I noticed that buffer size is allocated 64K in NuttX when reading from TTY and I found the related code in stream.c as follow:

#if defined(__NUTTX__) || defined(__TIZENRT__)
    stream->alloc_cb((uv_handle_t*)stream, 64 * 1024, &buf);
#else
    stream->alloc_cb((uv_handle_t*)stream, 2 * 1024, &buf);
#endif

It try to alloc 64K for NuttX and 2K for other platforms. I think that it's reversed. Or, do you have any other intensions for this?

from libtuv.

@niklauslee yes, it looks like those lines should be swapped.

from libtuv.