[PATCH] graphics: update libtiff to 4.0.6 version.

[Chris Johns]

On 16/04/2016 11:45 PM, Pavel Pisa wrote:
> From: Pavel Pisa <ppisa at pikron.com>
> 
> There has been collision between local extern excessive function
> declaration and C library (newlib) provided header and type
> in older libtiff version.

OK. Please push.

Thanks
Chris