fixed regexp to hide oauth token on streaming copy
fixed regexp to hide oauth token on streaming copy


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