Updated doc for cp command regarding metadata not being preserved when copying between providers
Updated doc for cp command regarding metadata not being preserved when copying between providers


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