[PATCH/tilegx] tilegx bug fixes & improvements

[Jiong Wang]

Hi All,

   attachments fix several bugs on tilegx exposed by dejagnu and improve 
tilegx gdb's info register output.

   after these patches, the dejagnu test result improved from:

                 === gdb Summary ===

# of expected passes            19030
# of unexpected failures        116

to:
                 === gdb Summary ===

# of expected passes            19100
# of unexpected failures        61


  these patches are against the latest commit:

    commit 2cca06a0bf0f859e20276e5c614db7b325753a8d
    Author: Joel Brobecker <brobecker@gnat.com>
    Date:   Thu Dec 6 04:57:06 2012 +0000

       aix-thread: Fix getthrds declaration and call.


please review, thanks

-- 
Regards,
Jiong. Wang
Tilera Corporation

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