builder/amazon: don't chmod on windows
builder/amazon: don't chmod on windows

Kaixiang/packer,TranscendComputing/packer,suma/packer,TranscendComputing/packer,Kaixiang/packer,suma/packer,TranscendComputing/packer,suma/packer,patricklucas/packer,Kaixiang/packer,patricklucas/packer,suma/packer,TranscendComputing/packer,Kaixiang/packer,patricklucas/packer,patricklucas/packer