Grab Yosys from Litex-Hub rather than "apt install".
Grab Yosys from Litex-Hub rather than "apt install".

The Ubuntu package is v0.9 which is too old for Amaranth.

Signed-off-by: Tim Callahan <ea16a3c075a6a229c9a452aa4faba7441b41c040@google.com>

google/CFU-Playground,google/CFU-Playground,google/CFU-Playground,google/CFU-Playground