builder/amazon/chroot: improved logging about what volume created
builder/amazon/chroot: improved logging about what volume created

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