RTEMS Documentation BSD (re)licensing statement for my contributions

[Martin Erik Werner]

(By request. Also added to https://devel.rtems.org/ticket/3899)

All previous contributions to the RTEMS documentation authored by me
(Martin Erik Werner) are, unless otherwise specified, licensed under
the terms of either

the Creative Commons Attribution Share Alike 4.0 International license
(https://spdx.org/licenses/CC-BY-SA-4.0)

or, at your option

the BSD 2-Clause "Simplified" License (
https://spdx.org/licenses/BSD-2-Clause).

-- 
Martin Erik Werner <martinerikwerner at gmail.com>