Investigate revmc's compilation config

[dajuguan]

• revmc create machine with the following machine config:

           Ok(Cow::Borrowed(HOST_TARGET_INFO.get_or_init(|| {
                    let triple = TargetMachine::get_default_triple();
                    let target = Target::from_triple(&triple).unwrap();
                    let cpu = TargetMachine::get_host_cpu_name().to_string_lossy().into_owned();
                    let features =
                        TargetMachine::get_host_cpu_features().to_string_lossy().into_owned();
                    Self { target, triple, cpu, features }
                })))

RelocMode::PIC, CodeModel::JITDefault, opt_level 3 for targetMachine, JITEngine and IR optimization

I tried the same config in go-evmc with both AOT and JIT compilation, but it still doesn’t work for the snailTracer contract.