RFC: patch for insight & target stdin

[James Lemke]

I had a customer complaint about insight, that target programs could
write to stdout but not read from stdin.  On Linux, stdout went to the
console window and stdin came from the launch shell.  On Windows stdout
went to the console window and stdin just failed with EBADF.

Apparently this was never implemented, so I made an attempt.  Reads from
stdin now come from the console window.  This has been tested with
x86-linux x xscale-elf and cygwin x xscale-elf.

I don't know gdb / gdbtk implementation well, so I'm open to comments.

Jim.

-- 
James Lemke   jim@wasabisystems.com   Orillia, Ontario
http://www.wasabisystems.com
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