Fix gsutil to preserve metadata during copy-in-the-cloud.
Fix gsutil to preserve metadata during copy-in-the-cloud.


craigcitro/gsutil,chriskuehl/gsutil-debian,GoogleCloudPlatform/gsutil,dtjackson/gsutil,mattdr/gsutil,fishjord/gsutil,dimfeld/gsutil,BrandonY/gsutil,GoogleCloudPlatform/gsutil,ttiurani/gsutil