RTEMS 5 tool chain update

[Sebastian Huber]

Hello,

I updated the tool chain (RSB) to use the latest Newlib snapshot 
(3.0.0.20180802).  This was necessary to fix a bug in the ctype support 
and to restore the FreeBSD compatibility in <sys/cdefs.h> required by 
libbsd.

-- 
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.

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