Fix hardcoding of js engine path for multi_timed_run.py / compareJIT.py
Fix hardcoding of js engine path for multi_timed_run.py / compareJIT.py

MozillaSecurity/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,MozillaSecurity/funfuzz