Update to waf 2.0.19?

[Andrew BUTTERFIELD]

Hi Sebastian,
 this is fine by me.

Regards, Andrew

Sent from my iPad

> On 25 Feb 2020, at 08:02, Sebastian Huber <sebastian.huber at embedded-brains.de> wrote:
> 
> Hello,
> 
> in order to close this bug:
> 
> https://devel.rtems.org/ticket/3569
> 
> I would like to update waf to the latest version 2.0.19 in:
> 
> rtems-docs
> rtems-tools
> rtems-libbsd
> rtems-examples
> 
> -- 
> Sebastian Huber, embedded brains GmbH
> 
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone   : +49 89 189 47 41-16
> Fax     : +49 89 189 47 41-09
> E-Mail  : sebastian.huber at embedded-brains.de
> PGP     : Public key available on request.
> 
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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