[Openocd-development] [COMMIT] More GDB fixes

[Spen <sp...@sp...>]

> 
> - Added a "User:" debug level. These are messages that are 
> intended for
>   the user and are part of normal operation.
> - Faster DEBUG/INFO() when they are disabled
> - target_read/write_buffer() now uses 16 and 32 bit access for single
>   word aligned requests. Other requests are serviced as quickly
>   as possible.
> - *much* faster read/write GDB packets, removing timeout problems.
> - GDB read/write packets w/single word aligned 32/16 bit access
>   now use 32/16 bit word access.
> - working area can now be changed on the fly. Provides a way to
>   move working area about as MMU is enabled/disabled.
> - cleaned up error messages for verify_image.
> 

Committed, also increased array log_strings size to suit.

Cheers
Spen