Fix bug where compiling 64-bit immediately after 32-bit shell builds do not work because the os.environ was being overwritten. Thanks to Christian for finding this.
Fix bug where compiling 64-bit immediately after 32-bit shell builds do not work because the os.environ was being overwritten. Thanks to Christian for finding this.

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