TileGX is always 64bit, ptrace always return 64bit data,  tilegx32 is 
just an ABI.

So the regset size should be regnum * 8 instead of regnum * 4. The 
latter cause gdbserver crash.

gdbserver/ChangeLog:

   * linux-tile-low.c (tile_regsets): Modify the size field as 64bit for 
each register.

please review.

thanks.

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Regards,
Jiong
Tilera Corporation.