Remove --ion-regalloc=greedy from shellFlags, since it's being removed from spidermonkey
Remove --ion-regalloc=greedy from shellFlags, since it's being removed from spidermonkey

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