mistral: Support the new routes-to-bin intermediate tool generation
mistral: Support the new routes-to-bin intermediate tool generation

YosysHQ/nextpnr,SymbiFlow/nextpnr,YosysHQ/nextpnr,YosysHQ/nextpnr,SymbiFlow/nextpnr,YosysHQ/nextpnr,SymbiFlow/nextpnr,SymbiFlow/nextpnr