bentley 451ab34244 Update to yosys-0.9. ...

Release notes:
https://github.com/YosysHQ/yosys/releases/tag/yosys-0.9

2019-10-28 08:00:17 +00:00

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Update to yosys-0.9.

2019-10-28 08:00:17 +00:00