New port: devel/lattice-ice40-examples-hx8k

Examples (LED blinky and VGA + PS/2) for the Lattice iCE40-HX8K
FPGA board from Olimex

WWW: https://github.com/OLIMEX/iCE40HX8K-EVB

PR: 227594
Submitted by: Johnny Sorocil <jsorocil@gmail.com>
Differential Revision: https://reviews.freebsd.org/D15632