Bug fix in yosys-vpr flow using OpenFPGA shell;

[tangxifan]

• Bug fix in yosys-vpr flow using OpenFPGA shell. Address issue I try to run openfpga shell which using yosys_vpr flow of the task flow, and find some error. #52
• Massive deployment of yosys-vpr flow in CI
• Enrich benchmark set with counter, RISCV etc.
• Speed up CI by using smaller but representative architectures