Take profile data for emulation core using profile
package.
> make build-profiler
> ./build/profiler/profiler -s=30 ROM_PATH
> go tool pprof -http=":8081" ./build/profiler/profiler ./build/profiler/cpu.pprof
# or: go tool pprof -png ./build/profiler/profiler ./build/profiler/cpu.pprof > ./build/profiler/cpu.pprof.png