Update of libbsd to close to FreeBSD 12 release planned

[Sebastian Huber]

Hello,

I have now a working update to FreeBSD 2018-09-12. I tested it on:

* Xilinx Zynq Qemu (ARMv7-A)
* Altera Cyclone V Devkit
* Microchip ATSAM V71 (ARMv7-M)
* NXP MCF548x (ColdFire)
* NXP i.MX 7D
* NXP QorIQ T4240 (PowerPC 64-bit)
* NXP MPC860 (PowerPC 32-bit)

I did the update in eight steps:

* Update to FreeBSD head 2018-09-12
* Update to FreeBSD head 2018-06-01
* Update to FreeBSD head 2018-04-01
* Update to FreeBSD head 2018-02-01
* Update to FreeBSD head 2017-12-01
* Update to FreeBSD head 2017-10-01
* Update to FreeBSD head 2017-08-01
* Update to FreeBSD head 2017-06-01

The patch set is too big to review. I will commit it next week after 
some more testing.

-- 
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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