[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>,
> 	"Joey Ye" <Joey.Ye@arm.com>
> Date: Wed, 11 Jul 2012 13:00:46 +0800
> 
> Hi Eli,
> 
> Could you please help to review this updated patch when you have time?
> Thanks.

What exactly changed since the previous version?