[PATCH]Fix that GDB will get hang on Windows when using pipe to get stdout and stderr from stub

[Eli Zaretskii]

> From: "Terry Guo" <terry.guo@arm.com>
> Cc: <gdb-patches@sourceware.org>
> Date: Wed, 27 Jun 2012 09:34:22 +0800
> 
> Can you help to review this proposal? The GDB trunk also has this issue.

I will, when I have time.  You only posted this one day ago.