Move arc4random support functions from libbsd to RTEMS

[Christian Mauderer]

Hello,

are there any objections to the second version of the patches?

That would be the following four for RTEMS:

- https://lists.rtems.org/pipermail/devel/2017-November/019500.html
- https://lists.rtems.org/pipermail/devel/2017-November/019503.html
- https://lists.rtems.org/pipermail/devel/2017-November/019502.html
- https://lists.rtems.org/pipermail/devel/2017-November/019501.html

And that one for libbsd:

- https://lists.rtems.org/pipermail/devel/2017-November/019448.html

As a follow up to this mail, you can find a chapter for the BSP-HowTo
that shortly describes the topic of getentropy().

Kind regards

Christian Mauderer